Your message dated Thu, 20 Apr 2023 21:26:05 +0100
with message-id <[email protected]>
and subject line Re: Bug#929531: grub-pc: grub2 fat_test fails with 
4.19.0-5-amd64 kernel if one ensure it does not gets auto-skipped
has caused the Debian Bug report #929531,
regarding grub-pc: grub2 fat_test fails with 4.19.0-5-amd64 kernel if one 
ensure it does not gets auto-skipped
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
929531: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=929531
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: grub-pc
Version: 2.02+dfsg1-18
Severity: serious
Tags: ftbfs
Justification: fails to build from source (but built successfully in the past)

Dear Maintainer,

while grub2 build fine as common users, i.e., the one created by the
Debian Installer with the addition that it's added to the 'kvm' group,
it does currently not as root depending on the Linux Kernel booted as
with some the fat_test fail.

Reproducer:

* installing Debian from recent weekly testing ISO, boot, install
  build-essentials and devscripts
* # uname -a
  Linux bussard 4.19.0-5-amd64 #1 SMP Debian 4.19.37-3 (2019-05-15)
  x86_64 GNU/Linux
* # apt source grub2
* # apt buil-dep grub2
* # cd grub2-2.02+dfsg1/
* # debuild -b -uc -us
  ...
   mkdir: cannot create directory
   ‘/tmp/tmp.gfJAxp7sgv/vfat12a_rw///0//1/2/3//4/5’: Input/output error

  (full test-suite.log inlined below)

kernel logged:
> May 25 20:27:51 bussard kernel: FAT-fs (loop0): error, corrupted directory 
> (invalid entries)
> May 25 20:27:51 bussard kernel: FAT-fs (loop0): Filesystem has been set 
> read-only
> May 25 20:27:51 bussard kernel: FAT-fs (loop0): error, fat_get_cluster: 
> invalid cluster chain (i_pos 0)

I tried multiple times, most of them with a reboot plus a complete
cleanup and re-download of the source inbetween, but did not always saw
the same error, different directories

As I had build this in the past sucessfully I was a bit thrown-off
first, reverting back to and older Kernel (first one I had lying arround
was linux-image-4.16.0-1-amd64) it worked again, and build successfully.

So, IMHO, there's an issue with either VFAT in the kernel itself, or how
GRUB2 (test) uses VFAT under current Kernels, which just does not shows
up as those FS test get skipped as common, unpriviledged, user, as the
mkfs and loop device handling is normally not allowed for them.

While yes, building as root is far from nice, it's the simplest way to
actually ensure those FS test get run and thus show up an issue.

I tested out some Kernels, most from the Ubuntu Mainline kernel ppa:
https://kernel.ubuntu.com/~kernel-ppa/mainline/

I had varying results, it seems that 4.19.1-041901-generic always
worked, but 4.19.37-041937-generic worked once, then on two different
VMs I got errors too, so a bit strange, a 4.19.28-041928-generic failed
to here, I did not invest more time into bisectin the issue because I
had not much available and was a bit confused by the behaviour..

Below the test-suite log output. I hope I got this to the correct
package people, as may have suited better on the kernel package, but as
I only could trigger this by building grub with the test running I
choose to initially report it here, sorry if it wasn't correct.
 
### BEGIN /root/grub2-2.02+dfsg1/obj/grub-pc/test-suite.log ###
==========================================
   GRUB 2.02+dfsg1-18: ./test-suite.log
   ==========================================

   # TOTAL: 81
   # PASS:  63
   # SKIP:  17
   # XFAIL: 0
   # FAIL:  1
   # XPASS: 0
   # ERROR: 0

   .. contents:: :depth: 2

   SKIP: squashfs_test
   ===================

   mksquashfs not installed; cannot test squashfs.

   SKIP: hfsplus_test
   ==================

   mkfs.hfsplus not installed; cannot test hfsplus.

   SKIP: ntfs_test
   ===============

   mkfs.ntfs not installed; cannot test ntfs.

   SKIP: reiserfs_test
   ===================

   mkfs.reiserfs not installed; cannot test reiserfs.

   FAIL: fat_test
   ==============

   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 120000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 120000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 120000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 120000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 120000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 120000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 120000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 120000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 240000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 240000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 240000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 240000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 240000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 240000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 240000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 240000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 1500KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 3000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 5000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 10000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 20000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 30000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 3000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 5000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 10000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 20000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 40000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 60000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 5000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 10000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 20000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 40000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   Device proc: Filesystem type procfs - Sector size 512B - Total size
   0KiB
   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
   0000-0000 - Sector size 512B - Total size 80000KiB
   Device host: Filesystem type hostfs - Sector size 512B - Total size
   0KiB

   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
   mkfs.fat 4.1 (2017-01-24)
   Warning: More than 32765 sector need TOS 1.04 or higher.
   mkdir: cannot create directory
   ‘/tmp/tmp.gfJAxp7sgv/vfat12a_rw///0//1/2/3//4/5’: Input/output error

   SKIP: minixfs_test
   ==================

   mkfs.minix doesn't support variable block size; cannot test minix*fs.

   SKIP: xfs_test
   ==============

   mkfs.xfs not installed; cannot test xfs.

   SKIP: nilfs2_test
   =================

   mkfs.nilfs2 not installed; cannot test nilfs2.

   SKIP: romfs_test
   ================

   genromfs not installed; cannot test romfs.

   SKIP: exfat_test
   ================

   mkfs.exfat not installed; cannot test exFAT.

   SKIP: udf_test
   ==============

   mkudffs not installed; cannot test UDF.

   SKIP: hfs_test
   ==============

   mkfs.hfs not installed; cannot test HFS.

   SKIP: jfs_test
   ==============

   mkfs.jfs not installed; cannot test JFS.

   SKIP: btrfs_test
   ================

   mkfs.btrfs not installed; cannot test btrfs.

   SKIP: zfs_test
   ==============

   zpool not installed; cannot test zfs.

   SKIP: gettext_strings_test
   ==========================

   Skipping upstream maintenance check.

   SKIP: grub_cmd_set_date
   =======================

   Skipping flaky test.

   SKIP: lzocompress_test
   ======================

   lzop not installed; cannot test lzo compression.

### END /root/grub2-2.02+dfsg1/obj/grub-pc/test-suite.log ###

-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/sda1 / ext4 rw,relatime,errors=remount-ro 0 0
/dev/loop0 /tmp/tmp.gfJAxp7sgv/vfat12a_rw vfat 
ro,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=utf8,shortname=mixed,utf8,errors=remount-ro
 0 0
*********************** END /proc/mounts

*********************** BEGIN /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}
function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 
--hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
else
  search --no-floppy --fs-uuid --set=root ccff1e50-b5e2-46c0-9976-d97e7c47b10d
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=en_US
  insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
  set timeout=30
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=5
  # Fallback normal timeout code in case the timeout_style feature is
  # unavailable.
  else
    set timeout=5
  fi
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
        set gfxpayload="${1}"
}
set linux_gfx_mode=
export linux_gfx_mode
menuentry 'Debian GNU/Linux' --class debian --class gnu-linux --class gnu 
--class os $menuentry_id_option 
'gnulinux-simple-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
        load_video
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_msdos
        insmod ext2
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 
--hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
        else
          search --no-floppy --fs-uuid --set=root 
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
        fi
        echo    'Loading Linux 4.19.0-5-amd64 ...'
        linux   /boot/vmlinuz-4.19.0-5-amd64 
root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro  quiet
        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-4.19.0-5-amd64
}
submenu 'Advanced options for Debian GNU/Linux' $menuentry_id_option 
'gnulinux-advanced-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
        menuentry 'Debian GNU/Linux, with Linux 4.19.0-5-amd64' --class debian 
--class gnu-linux --class gnu --class os $menuentry_id_option 
'gnulinux-4.19.0-5-amd64-advanced-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
                load_video
                insmod gzio
                if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; 
fi
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
                else
                  search --no-floppy --fs-uuid --set=root 
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
                fi
                echo    'Loading Linux 4.19.0-5-amd64 ...'
                linux   /boot/vmlinuz-4.19.0-5-amd64 
root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro  quiet
                echo    'Loading initial ramdisk ...'
                initrd  /boot/initrd.img-4.19.0-5-amd64
        }
        menuentry 'Debian GNU/Linux, with Linux 4.19.0-5-amd64 (recovery mode)' 
--class debian --class gnu-linux --class gnu --class os $menuentry_id_option 
'gnulinux-4.19.0-5-amd64-recovery-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
                load_video
                insmod gzio
                if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; 
fi
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
                else
                  search --no-floppy --fs-uuid --set=root 
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
                fi
                echo    'Loading Linux 4.19.0-5-amd64 ...'
                linux   /boot/vmlinuz-4.19.0-5-amd64 
root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro single 
                echo    'Loading initial ramdisk ...'
                initrd  /boot/initrd.img-4.19.0-5-amd64
        }
        menuentry 'Debian GNU/Linux, with Linux 4.19.0-4-amd64' --class debian 
--class gnu-linux --class gnu --class os $menuentry_id_option 
'gnulinux-4.19.0-4-amd64-advanced-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
                load_video
                insmod gzio
                if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; 
fi
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
                else
                  search --no-floppy --fs-uuid --set=root 
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
                fi
                echo    'Loading Linux 4.19.0-4-amd64 ...'
                linux   /boot/vmlinuz-4.19.0-4-amd64 
root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro  quiet
                echo    'Loading initial ramdisk ...'
                initrd  /boot/initrd.img-4.19.0-4-amd64
        }
        menuentry 'Debian GNU/Linux, with Linux 4.19.0-4-amd64 (recovery mode)' 
--class debian --class gnu-linux --class gnu --class os $menuentry_id_option 
'gnulinux-4.19.0-4-amd64-recovery-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
                load_video
                insmod gzio
                if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; 
fi
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
                else
                  search --no-floppy --fs-uuid --set=root 
ccff1e50-b5e2-46c0-9976-d97e7c47b10d
                fi
                echo    'Loading Linux 4.19.0-4-amd64 ...'
                linux   /boot/vmlinuz-4.19.0-4-amd64 
root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro single 
                echo    'Loading initial ramdisk ...'
                initrd  /boot/initrd.img-4.19.0-4-amd64
        }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
*********************** END /boot/grub/grub.cfg

*********************** BEGIN /proc/mdstat
cat: /proc/mdstat: No such file or directory
*********************** END /proc/mdstat

*********************** BEGIN /dev/disk/by-id
total 0
lrwxrwxrwx 1 root root  9 May 25 18:30 ata-QEMU_DVD-ROM_QM00003 -> ../../sr0
lrwxrwxrwx 1 root root  9 May 25 18:30 scsi-0QEMU_QEMU_HARDDISK_drive-scsi0 -> 
../../sda
lrwxrwxrwx 1 root root 10 May 25 18:30 
scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part1 -> ../../sda1
*********************** END /dev/disk/by-id

*********************** BEGIN /dev/disk/by-uuid
total 0
lrwxrwxrwx 1 root root  9 May 25 18:30 2019-05-16-09-22-57-00 -> ../../sr0
lrwxrwxrwx 1 root root 10 May 25 18:30 ccff1e50-b5e2-46c0-9976-d97e7c47b10d -> 
../../sda1
*********************** END /dev/disk/by-uuid

-- System Information:
Debian Release: 10.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-5-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages grub-pc depends on:
ii  debconf [debconf-2.0]  1.5.71
ii  grub-common            2.02+dfsg1-18
ii  grub-pc-bin            2.02+dfsg1-18
ii  grub2-common           2.02+dfsg1-18
ii  ucf                    3.0038+nmu1

grub-pc recommends no packages.

grub-pc suggests no packages.

-- debconf information excluded

--- End Message ---
--- Begin Message ---
Control: close -1 2.06-5

I think this looks very like the issue I fixed there...

On Sat, May 25, 2019 at 09:50:33PM +0200, Thomas Lamprecht wrote:
>Package: grub-pc
>Version: 2.02+dfsg1-18
>Severity: serious
>Tags: ftbfs
>Justification: fails to build from source (but built successfully in the past)
>
>Dear Maintainer,
>
>while grub2 build fine as common users, i.e., the one created by the
>Debian Installer with the addition that it's added to the 'kvm' group,
>it does currently not as root depending on the Linux Kernel booted as
>with some the fat_test fail.
>
>Reproducer:
>
>* installing Debian from recent weekly testing ISO, boot, install
>  build-essentials and devscripts
>* # uname -a
>  Linux bussard 4.19.0-5-amd64 #1 SMP Debian 4.19.37-3 (2019-05-15)
>  x86_64 GNU/Linux
>* # apt source grub2
>* # apt buil-dep grub2
>* # cd grub2-2.02+dfsg1/
>* # debuild -b -uc -us
>  ...
>   mkdir: cannot create directory
>   ‘/tmp/tmp.gfJAxp7sgv/vfat12a_rw///0//1/2/3//4/5’: Input/output error
>
>  (full test-suite.log inlined below)
>
>kernel logged:
>> May 25 20:27:51 bussard kernel: FAT-fs (loop0): error, corrupted directory 
>> (invalid entries)
>> May 25 20:27:51 bussard kernel: FAT-fs (loop0): Filesystem has been set 
>> read-only
>> May 25 20:27:51 bussard kernel: FAT-fs (loop0): error, fat_get_cluster: 
>> invalid cluster chain (i_pos 0)
>
>I tried multiple times, most of them with a reboot plus a complete
>cleanup and re-download of the source inbetween, but did not always saw
>the same error, different directories
>
>As I had build this in the past sucessfully I was a bit thrown-off
>first, reverting back to and older Kernel (first one I had lying arround
>was linux-image-4.16.0-1-amd64) it worked again, and build successfully.
>
>So, IMHO, there's an issue with either VFAT in the kernel itself, or how
>GRUB2 (test) uses VFAT under current Kernels, which just does not shows
>up as those FS test get skipped as common, unpriviledged, user, as the
>mkfs and loop device handling is normally not allowed for them.
>
>While yes, building as root is far from nice, it's the simplest way to
>actually ensure those FS test get run and thus show up an issue.
>
>I tested out some Kernels, most from the Ubuntu Mainline kernel ppa:
>https://kernel.ubuntu.com/~kernel-ppa/mainline/
>
>I had varying results, it seems that 4.19.1-041901-generic always
>worked, but 4.19.37-041937-generic worked once, then on two different
>VMs I got errors too, so a bit strange, a 4.19.28-041928-generic failed
>to here, I did not invest more time into bisectin the issue because I
>had not much available and was a bit confused by the behaviour..
>
>Below the test-suite log output. I hope I got this to the correct
>package people, as may have suited better on the kernel package, but as
>I only could trigger this by building grub with the test running I
>choose to initially report it here, sorry if it wasn't correct.
> 
>### BEGIN /root/grub2-2.02+dfsg1/obj/grub-pc/test-suite.log ###
>==========================================
>   GRUB 2.02+dfsg1-18: ./test-suite.log
>   ==========================================
>
>   # TOTAL: 81
>   # PASS:  63
>   # SKIP:  17
>   # XFAIL: 0
>   # FAIL:  1
>   # XPASS: 0
>   # ERROR: 0
>
>   .. contents:: :depth: 2
>
>   SKIP: squashfs_test
>   ===================
>
>   mksquashfs not installed; cannot test squashfs.
>
>   SKIP: hfsplus_test
>   ==================
>
>   mkfs.hfsplus not installed; cannot test hfsplus.
>
>   SKIP: ntfs_test
>   ===============
>
>   mkfs.ntfs not installed; cannot test ntfs.
>
>   SKIP: reiserfs_test
>   ===================
>
>   mkfs.reiserfs not installed; cannot test reiserfs.
>
>   FAIL: fat_test
>   ==============
>
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 120000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 120000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 120000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 120000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 120000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 120000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 120000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 120000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 240000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 240000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 240000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 240000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 240000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 240000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 240000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 240000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.wcIfohU4Fn/vfat16a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 1500KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 3000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 5000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 10000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 20000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 30000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 3000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 5000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 10000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 20000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 40000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 60000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 5000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 10000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 20000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 40000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   Device proc: Filesystem type procfs - Sector size 512B - Total size
>   0KiB
>   Device loop0: Filesystem type fat - Label `GRUBTEST ;_', UUID
>   0000-0000 - Sector size 512B - Total size 80000KiB
>   Device host: Filesystem type hostfs - Sector size 512B - Total size
>   0KiB
>
>   umount: /tmp/tmp.gfJAxp7sgv/vfat12a_rw: not mounted.
>   mkfs.fat 4.1 (2017-01-24)
>   Warning: More than 32765 sector need TOS 1.04 or higher.
>   mkdir: cannot create directory
>   ‘/tmp/tmp.gfJAxp7sgv/vfat12a_rw///0//1/2/3//4/5’: Input/output error
>
>   SKIP: minixfs_test
>   ==================
>
>   mkfs.minix doesn't support variable block size; cannot test minix*fs.
>
>   SKIP: xfs_test
>   ==============
>
>   mkfs.xfs not installed; cannot test xfs.
>
>   SKIP: nilfs2_test
>   =================
>
>   mkfs.nilfs2 not installed; cannot test nilfs2.
>
>   SKIP: romfs_test
>   ================
>
>   genromfs not installed; cannot test romfs.
>
>   SKIP: exfat_test
>   ================
>
>   mkfs.exfat not installed; cannot test exFAT.
>
>   SKIP: udf_test
>   ==============
>
>   mkudffs not installed; cannot test UDF.
>
>   SKIP: hfs_test
>   ==============
>
>   mkfs.hfs not installed; cannot test HFS.
>
>   SKIP: jfs_test
>   ==============
>
>   mkfs.jfs not installed; cannot test JFS.
>
>   SKIP: btrfs_test
>   ================
>
>   mkfs.btrfs not installed; cannot test btrfs.
>
>   SKIP: zfs_test
>   ==============
>
>   zpool not installed; cannot test zfs.
>
>   SKIP: gettext_strings_test
>   ==========================
>
>   Skipping upstream maintenance check.
>
>   SKIP: grub_cmd_set_date
>   =======================
>
>   Skipping flaky test.
>
>   SKIP: lzocompress_test
>   ======================
>
>   lzop not installed; cannot test lzo compression.
>
>### END /root/grub2-2.02+dfsg1/obj/grub-pc/test-suite.log ###
>
>-- Package-specific info:
>
>*********************** BEGIN /proc/mounts
>/dev/sda1 / ext4 rw,relatime,errors=remount-ro 0 0
>/dev/loop0 /tmp/tmp.gfJAxp7sgv/vfat12a_rw vfat 
>ro,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=utf8,shortname=mixed,utf8,errors=remount-ro
> 0 0
>*********************** END /proc/mounts
>
>*********************** BEGIN /boot/grub/grub.cfg
>#
># DO NOT EDIT THIS FILE
>#
># It is automatically generated by grub-mkconfig using templates
># from /etc/grub.d and settings from /etc/default/grub
>#
>
>### BEGIN /etc/grub.d/00_header ###
>if [ -s $prefix/grubenv ]; then
>  set have_grubenv=true
>  load_env
>fi
>if [ "${next_entry}" ] ; then
>   set default="${next_entry}"
>   set next_entry=
>   save_env next_entry
>   set boot_once=true
>else
>   set default="0"
>fi
>
>if [ x"${feature_menuentry_id}" = xy ]; then
>  menuentry_id_option="--id"
>else
>  menuentry_id_option=""
>fi
>
>export menuentry_id_option
>
>if [ "${prev_saved_entry}" ]; then
>  set saved_entry="${prev_saved_entry}"
>  save_env saved_entry
>  set prev_saved_entry=
>  save_env prev_saved_entry
>  set boot_once=true
>fi
>
>function savedefault {
>  if [ -z "${boot_once}" ]; then
>    saved_entry="${chosen}"
>    save_env saved_entry
>  fi
>}
>function load_video {
>  if [ x$feature_all_video_module = xy ]; then
>    insmod all_video
>  else
>    insmod efi_gop
>    insmod efi_uga
>    insmod ieee1275_fb
>    insmod vbe
>    insmod vga
>    insmod video_bochs
>    insmod video_cirrus
>  fi
>}
>
>if [ x$feature_default_font_path = xy ] ; then
>   font=unicode
>else
>insmod part_msdos
>insmod ext2
>set root='hd0,msdos1'
>if [ x$feature_platform_search_hint = xy ]; then
>  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 
> --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>else
>  search --no-floppy --fs-uuid --set=root ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>fi
>    font="/usr/share/grub/unicode.pf2"
>fi
>
>if loadfont $font ; then
>  set gfxmode=auto
>  load_video
>  insmod gfxterm
>  set locale_dir=$prefix/locale
>  set lang=en_US
>  insmod gettext
>fi
>terminal_output gfxterm
>if [ "${recordfail}" = 1 ] ; then
>  set timeout=30
>else
>  if [ x$feature_timeout_style = xy ] ; then
>    set timeout_style=menu
>    set timeout=5
>  # Fallback normal timeout code in case the timeout_style feature is
>  # unavailable.
>  else
>    set timeout=5
>  fi
>fi
>### END /etc/grub.d/00_header ###
>
>### BEGIN /etc/grub.d/05_debian_theme ###
>set menu_color_normal=cyan/blue
>set menu_color_highlight=white/blue
>### END /etc/grub.d/05_debian_theme ###
>
>### BEGIN /etc/grub.d/10_linux ###
>function gfxmode {
>       set gfxpayload="${1}"
>}
>set linux_gfx_mode=
>export linux_gfx_mode
>menuentry 'Debian GNU/Linux' --class debian --class gnu-linux --class gnu 
>--class os $menuentry_id_option 
>'gnulinux-simple-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
>       load_video
>       insmod gzio
>       if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
>       insmod part_msdos
>       insmod ext2
>       set root='hd0,msdos1'
>       if [ x$feature_platform_search_hint = xy ]; then
>         search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 
> --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>       else
>         search --no-floppy --fs-uuid --set=root 
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>       fi
>       echo    'Loading Linux 4.19.0-5-amd64 ...'
>       linux   /boot/vmlinuz-4.19.0-5-amd64 
> root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro  quiet
>       echo    'Loading initial ramdisk ...'
>       initrd  /boot/initrd.img-4.19.0-5-amd64
>}
>submenu 'Advanced options for Debian GNU/Linux' $menuentry_id_option 
>'gnulinux-advanced-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
>       menuentry 'Debian GNU/Linux, with Linux 4.19.0-5-amd64' --class debian 
> --class gnu-linux --class gnu --class os $menuentry_id_option 
> 'gnulinux-4.19.0-5-amd64-advanced-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
>               load_video
>               insmod gzio
>               if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; 
> fi
>               insmod part_msdos
>               insmod ext2
>               set root='hd0,msdos1'
>               if [ x$feature_platform_search_hint = xy ]; then
>                 search --no-floppy --fs-uuid --set=root 
> --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>               else
>                 search --no-floppy --fs-uuid --set=root 
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>               fi
>               echo    'Loading Linux 4.19.0-5-amd64 ...'
>               linux   /boot/vmlinuz-4.19.0-5-amd64 
> root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro  quiet
>               echo    'Loading initial ramdisk ...'
>               initrd  /boot/initrd.img-4.19.0-5-amd64
>       }
>       menuentry 'Debian GNU/Linux, with Linux 4.19.0-5-amd64 (recovery mode)' 
> --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 
> 'gnulinux-4.19.0-5-amd64-recovery-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
>               load_video
>               insmod gzio
>               if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; 
> fi
>               insmod part_msdos
>               insmod ext2
>               set root='hd0,msdos1'
>               if [ x$feature_platform_search_hint = xy ]; then
>                 search --no-floppy --fs-uuid --set=root 
> --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>               else
>                 search --no-floppy --fs-uuid --set=root 
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>               fi
>               echo    'Loading Linux 4.19.0-5-amd64 ...'
>               linux   /boot/vmlinuz-4.19.0-5-amd64 
> root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro single 
>               echo    'Loading initial ramdisk ...'
>               initrd  /boot/initrd.img-4.19.0-5-amd64
>       }
>       menuentry 'Debian GNU/Linux, with Linux 4.19.0-4-amd64' --class debian 
> --class gnu-linux --class gnu --class os $menuentry_id_option 
> 'gnulinux-4.19.0-4-amd64-advanced-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
>               load_video
>               insmod gzio
>               if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; 
> fi
>               insmod part_msdos
>               insmod ext2
>               set root='hd0,msdos1'
>               if [ x$feature_platform_search_hint = xy ]; then
>                 search --no-floppy --fs-uuid --set=root 
> --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>               else
>                 search --no-floppy --fs-uuid --set=root 
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>               fi
>               echo    'Loading Linux 4.19.0-4-amd64 ...'
>               linux   /boot/vmlinuz-4.19.0-4-amd64 
> root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro  quiet
>               echo    'Loading initial ramdisk ...'
>               initrd  /boot/initrd.img-4.19.0-4-amd64
>       }
>       menuentry 'Debian GNU/Linux, with Linux 4.19.0-4-amd64 (recovery mode)' 
> --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 
> 'gnulinux-4.19.0-4-amd64-recovery-ccff1e50-b5e2-46c0-9976-d97e7c47b10d' {
>               load_video
>               insmod gzio
>               if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; 
> fi
>               insmod part_msdos
>               insmod ext2
>               set root='hd0,msdos1'
>               if [ x$feature_platform_search_hint = xy ]; then
>                 search --no-floppy --fs-uuid --set=root 
> --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>               else
>                 search --no-floppy --fs-uuid --set=root 
> ccff1e50-b5e2-46c0-9976-d97e7c47b10d
>               fi
>               echo    'Loading Linux 4.19.0-4-amd64 ...'
>               linux   /boot/vmlinuz-4.19.0-4-amd64 
> root=UUID=ccff1e50-b5e2-46c0-9976-d97e7c47b10d ro single 
>               echo    'Loading initial ramdisk ...'
>               initrd  /boot/initrd.img-4.19.0-4-amd64
>       }
>}
>
>### END /etc/grub.d/10_linux ###
>
>### BEGIN /etc/grub.d/20_linux_xen ###
>
>### END /etc/grub.d/20_linux_xen ###
>
>### BEGIN /etc/grub.d/30_os-prober ###
>### END /etc/grub.d/30_os-prober ###
>
>### BEGIN /etc/grub.d/30_uefi-firmware ###
>### END /etc/grub.d/30_uefi-firmware ###
>
>### BEGIN /etc/grub.d/40_custom ###
># This file provides an easy way to add custom menu entries.  Simply type the
># menu entries you want to add after this comment.  Be careful not to change
># the 'exec tail' line above.
>### END /etc/grub.d/40_custom ###
>
>### BEGIN /etc/grub.d/41_custom ###
>if [ -f  ${config_directory}/custom.cfg ]; then
>  source ${config_directory}/custom.cfg
>elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
>  source $prefix/custom.cfg;
>fi
>### END /etc/grub.d/41_custom ###
>*********************** END /boot/grub/grub.cfg
>
>*********************** BEGIN /proc/mdstat
>cat: /proc/mdstat: No such file or directory
>*********************** END /proc/mdstat
>
>*********************** BEGIN /dev/disk/by-id
>total 0
>lrwxrwxrwx 1 root root  9 May 25 18:30 ata-QEMU_DVD-ROM_QM00003 -> ../../sr0
>lrwxrwxrwx 1 root root  9 May 25 18:30 scsi-0QEMU_QEMU_HARDDISK_drive-scsi0 -> 
>../../sda
>lrwxrwxrwx 1 root root 10 May 25 18:30 
>scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part1 -> ../../sda1
>*********************** END /dev/disk/by-id
>
>*********************** BEGIN /dev/disk/by-uuid
>total 0
>lrwxrwxrwx 1 root root  9 May 25 18:30 2019-05-16-09-22-57-00 -> ../../sr0
>lrwxrwxrwx 1 root root 10 May 25 18:30 ccff1e50-b5e2-46c0-9976-d97e7c47b10d -> 
>../../sda1
>*********************** END /dev/disk/by-uuid
>
>-- System Information:
>Debian Release: 10.0
>  APT prefers testing
>  APT policy: (500, 'testing')
>Architecture: amd64 (x86_64)
>
>Kernel: Linux 4.19.0-5-amd64 (SMP w/4 CPU cores)
>Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
>LANGUAGE=en_US:en (charmap=UTF-8)
>Shell: /bin/sh linked to /usr/bin/dash
>Init: systemd (via /run/systemd/system)
>
>Versions of packages grub-pc depends on:
>ii  debconf [debconf-2.0]  1.5.71
>ii  grub-common            2.02+dfsg1-18
>ii  grub-pc-bin            2.02+dfsg1-18
>ii  grub2-common           2.02+dfsg1-18
>ii  ucf                    3.0038+nmu1
>
>grub-pc recommends no packages.
>
>grub-pc suggests no packages.
>
>-- debconf information excluded
-- 
Steve McIntyre, Cambridge, UK.                                [email protected]
You lock the door
And throw away the key
There's someone in my head but it's not me 

--- End Message ---

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