[Bug 1073108] Re: grub-pc fails to boot (system resets after GRUB prompt) on degraded RAID
Louis Bouchard
louis.bouchard at canonical.com
Fri Sep 19 14:25:06 UTC 2014
Test case described above passes correctly.
** Tags removed: verification-needed
** Tags added: verification-done
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https://bugs.launchpad.net/bugs/1073108
Title:
grub-pc fails to boot (system resets after GRUB prompt) on degraded
RAID
Status in “grub2” package in Ubuntu:
Invalid
Status in “grub2” source package in Precise:
Fix Committed
Bug description:
[SRU justification]
System does not boot in degraded mode on second disk. This is systematic when system is localized in french (fr_FR.UTF-8)
[Impact]
Unable to boot system in degraded mode
[Fix]
Backport uptream fix :
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=626853
[Test Case]
- Install system with system disk as RAID1 with french localization.
- Remove first disk (/dev/sda) from the system
- Boot the system.
Without the patch, grub will loop forever and the system will not boot.
With the patch, the system boots normally.
[Regression]
None expected. This fix is already in present in Debian Wheezy, Ubuntu Trusty and Utopic.
[Description of the problem]
When a RAID1 system is degraded (e.g. unplug /dev/sdb, leaving obnly
/dev/sda), grub-pc properly enters prompt but system is reset as soon
as one attemps to boot OR one enters the command-line and issue the
'ls' command.
This bug is known (and presumably fixed) to Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=626853
Shortly put: adding the 'GRUB_TERMINAL=console' to '/etc/default/grub' (and executing 'update-grub' afterwards) allows to circumvent the issue (verified on Ubuntu/Quantal 12.10).
I believe this bug is critical because it shows up only when a disk
fails but remains latent on a healthy system.
Cheers
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