Public bug reported:
I have two identical disks set up in a fake RAID configuration through
the PC BIOS, over which a LVM2 volume where all my partitions live
except /boot, which is on its dedicated RAID partition.
After the upgrade to 11.04, when doing a cold restart, /dev/dm-* files aren't
found, so the booting halts with an error. Stock 11.04 kernel is used as per
uname:
Linux rihad 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64
x86_64 x86_64 GNU/Linux
Apparently the new kernel also messes up the RAID configuration, because
the array members are then shown as OFFLINE in the BIOS making the disks
unusable, and nothing short of a cold restart brings them back to life.
Fortunately I was wise enough to have saved the previous distro's kernel
vmlinuz-2.6.35-28-generic in my GRUB menu, booting into which can
correctly initialize the LVM2/DM subsystem, and then after doing a warm
reboot into the newer kernel everything works. So I must do a two-phased
boot every morning, which sucks.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: boot booting
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https://bugs.launchpad.net/bugs/880646
Title:
11.04 and up cannot start from RAID/LVM2
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