[Bug 594202] Re: grub2 installed on raid1 can not boot from second disk when first disk is removed

[Marcus Tomlinson]

This release of Ubuntu is no longer receiving maintenance updates. If
this is still an issue on a maintained version of Ubuntu please let us
know.

** Changed in: grub2 (Ubuntu)
       Status: Confirmed => Incomplete

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Title:
  grub2 installed on raid1 can not boot from second disk when first disk
  is removed

Status in grub2 package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: grub2

  I've installed Ubuntu Server 10.04 on a RAID1 device (md0) built upon
  2 50G partitions on 2 1TB Samsung disks.  Installation went
  flawlessly, I was able to boot the machine with no problems. To test,
  if the server will survive a drive failure, I removed the second disk.
  The system still booted OK, with array in degraded mode. After that, I
  reconnected second drive, boot into Ubuntu and let the drives resync.

  Then I removed the first drive and tried to boot with only second
  drive attached. This ended up in an endless reboot loop -- after the
  BIOS finishes its duties, the PC immediately reboots as soon as it
  tries to load grub. Reconnecting the first drive fixes the problem.

  This is a second time I encounter this bug, first time I stumbled upon
  it after a first drive failure on a busy server -- I also couldn't
  boot from the second drive, but I assumed, that both drives were dead
  and restored the server from backups.

  'lsb_release -rd'
  Description:	Ubuntu 10.04 LTS
  Release:	10.04

  Grub is installed on both drives.

  What i expected: I will be able to boot from the second drive
  What happened instead: I was unable to boot from the second drive

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