There are plenty of people who *are* able to check file systems larger than
16TB. So talking about it in terms "that problem" doesn't make much sense.
There is a known issue where if you are using a huge number of hard links (if
you are using a backup solution which uses hard links and a huge number of
parallel directory hierarchies) e2fsck uses a large amount of memory. I don't
know if that's what you are doing, but if that's what you are doing, it
wouldn't surprise me if you are running out of memory. You should have gotten
an explicit "you ran out of memory" error instead of a seg fault, though.
There is a way you can use scratch files for some of the data structures that
e2fsck needs to track all of the hard links; see the
"The [scratch_files] Stanza" section in the e2fsck.conf. However, this is
going to be *SLOW*. The primary use of this was for people who were using
32-bit systems and who didn't have the address space for the memory
requirements for large file systems with a large number of hard links. You
may be better off just trying to configure our swap space. (All of this is
assuming the problem is that the file system has a very large number of hard
link farms. Have you confirmed that when you configured 25GB of swap, that the
system actually used that amount of swap)?
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https://bugs.launchpad.net/bugs/1345682
Title:
fsck on 24TB ext4 keeps crashing
Status in e2fsprogs package in Ubuntu:
Incomplete
Bug description:
date; fsck -vy /dev/mapper/raid61p1 ;date
Thu Jul 17 11:54:21 PDT 2014
fsck from util-linux 2.20.1
I can't get my ext4 24TB to fsck clean. there came a whole bunch of file stat
problems after a clean reboot.
I tried 3 times so far, and each does something like segfault. I looked
twice, and the errors were different,
but was able to capture one output. The system has 6GB ram, and it used up
all the memory. ended up adding 25GB
of swap as fsck seems to use up a huge amount of memory. After a long while,
usually after mem use is >90%,
I come back to see the fsck has crashed and file system is still not clean.
The reboot was clean and should not have caused any corruption. the
system is using ubuntu-14.04
# uname -a
Linux gigabyte133 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux
root@gigabyte133:~#
I had to use the 64 bit version since the 32 bit version I couldn't get more
than 15TB file system built and read
that there were compatibility problems between 32bit version with the -O
64bit and the 64 bit version so just
built the whole thing in 64 bit ubuntu..
e2fsck 1.42.9 (4-Feb-2014)
/dev/mapper/raid61p1 contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
Inode 203167820 has compression flag set on filesystem without compression
support. Clear? yes
Signal (11) SIGSEGV si_code=SI_KERNEL fault addr=(nil)
fsck.ext4[0x4266f1]
/lib/x86_64-linux-gnu/libc.so.6(+0x36ff0)[0x7fd38d087ff0]
/lib/x86_64-linux-gnu/libext2fs.so.2(ext2fs_rb_next+0x23)[0x7fd38dc7bc43]
/lib/x86_64-linux-gnu/libext2fs.so.2(+0x10670)[0x7fd38dc5e670]
fsck.ext4[0x4100f6]# lsb_release -va
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty
/lib/x86_64-linux-gnu/libext2fs.so.2(+0x11c3d)[0x7fd38dc5fc3d]
/lib/x86_64-linux-gnu/libext2fs.so.2(+0x11f78)[0x7fd38dc5ff78]
/lib/x86_64-linux-gnu/libext2fs.so.2(ext2fs_block_iterate3+0xa13)[0x7fd38dc60b13]
fsck.ext4[0x4115c4]
fsck.ext4[0x412699]
fsck.ext4[0x412761]
/lib/x86_64-linux-gnu/libext2fs.so.2(ext2fs_get_next_inode_full+0x59)[0x7fd38dc6c9a9]
fsck.ext4(e2fsck_pass1+0x8d8)[0x4130c8]
fsck.ext4(e2fsck_run+0x52)[0x40deb2]
fsck.ext4(main+0xd27)[0x40a0e7]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7fd38d072ec5]
fsck.ext4[0x40bde6]
Thu Jul 17 15:55:01 PDT 2014
# lsb_release -va
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: util-linux 2.20.1-5.1ubuntu20.1
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
Date: Sat Jul 19 18:49:32 2014
InstallationDate: Installed on 2014-07-11 (8 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: util-linux
UpgradeStatus: No upgrade log present (probably fresh install)
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