Public bug reported:
Have used an UBUNTU 12.04 installation on /dev/md0 (sda2, sdb2). Installed
16.04 on non-RAID sda4. Filesystem on /dev/md0 shows when booted into 16.04,
after clicking on it, without problems (/media/goran/0123something). All
attempts to get grub to accept a menuentry fails (file not found) because the
raid files don't show up after "set root=(hd0,2)"; manual attempt at booting:
grub> ls (hd0,2)
- gives the device information correctly
grub> ls (hd0,2)/
- file not found
- - likewise with (hd1,2)
I have Ubuntu 14.04 on sdb3 since two years back, when this problem did not
occur with grub. Installation of 16.04 is the first non-CD installation, done
with the following on the raided grub of 12.04, isofile on sdb3:
menuentry “Ubuntu_16.04_ISO” {
set root=(hd1,3)
set isofile="/home/goran/Downloads/xenial-desktop-i386.iso"
loopback loop $isofile
linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile noprompt
noeject
initrd (loop)/casper/initrd.lz
}
Would still like to boot into 12.04 since that is where I have four years worth
of program installations.
lsb_release -rd: Description: Ubuntu 16.04 LTS
Release: 16.04
apt-cache policy grub2: grub2:
Installed: 2.02~beta2-36ubuntu3
Candidate: 2.02~beta2-36ubuntu3
Version table:
*** 2.02~beta2-36ubuntu3 500
500 http://fi.archive.ubuntu.com/ubuntu xenial/universe i386 Packages
100 /var/lib/dpkg/status
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1574332
Title:
grub does not load RAID partitions
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