[Bug 563895] Re: grub2 fails to boot or install when an LVM snapshot exists

[nutznboltz]

** Description changed:

+ SRU Justification:
+ 
+ Impact: When /boot and / are in an LVM VG and a snapshot is made of an
+ LVM LV in that VG the system will not boot and grub can not be modified
+ (updated, reinstalled.)
+ 
+ Testcase:
+ 
  Binary package hint: grub2
  
  Steps to reproduce:
  
  - (Lucid beta2 installed from CD)
  - Take a snapshot of any volume
  - on reboot:
-   error: fd0 read error.
-   error: no such disk.
-   grub rescue>
+   error: fd0 read error.
+   error: no such disk.
+   grub rescue>
  - Use the rescue cd to get a root shell
  - Remove the snapshot and reboot
  Now, the system boots. Create a new snapshot to repeat.
  
  The system has 2 SATA disks in mdadm RAID1 configuration with 1 lvm
  volume on top and no 'normal' partitions.
+ 
+ Also see Comment #6
+ https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/563895/comments/6
+ 
+ Fix: See debdiff patch

** Tags added: testcase

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https://bugs.launchpad.net/bugs/563895

Title:
  grub2 fails to boot or install when an LVM snapshot exists

Status in “grub2” package in Ubuntu:
  Fix Released
Status in “grub2” package in Debian:
  Fix Released

Bug description:
  SRU Justification:

  Impact: When /boot and / are in an LVM VG and a snapshot is made of an
  LVM LV in that VG the system will not boot and grub can not be
  modified (updated, reinstalled.)

  Testcase:

  Binary package hint: grub2

  Steps to reproduce:

  - (Lucid beta2 installed from CD)
  - Take a snapshot of any volume
  - on reboot:
    error: fd0 read error.
    error: no such disk.
    grub rescue>
  - Use the rescue cd to get a root shell
  - Remove the snapshot and reboot
  Now, the system boots. Create a new snapshot to repeat.

  The system has 2 SATA disks in mdadm RAID1 configuration with 1 lvm
  volume on top and no 'normal' partitions.

  Also see Comment #6
  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/563895/comments/6

  Fix: See debdiff patch

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