[Bug 999076] Re: mdadm 0.9 metadata at the end of the disk confuses grub

no!chance ralf.fehlau at gmx.net
Mon Jun 23 03:58:35 UTC 2014


The problem still exists in Ubuntu 12.04. In my case it occurs when
changing both HDs from 1TB to 3TB size of the same type. With the 1TB
drives, the problem did not occur.

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https://bugs.launchpad.net/bugs/999076

Title:
  mdadm 0.9 metadata at the end of the disk confuses grub

Status in GRand Unified Bootloader:
  Unknown
Status in “grub2” package in Ubuntu:
  Triaged

Bug description:
  When using mdadm metadata format 0.9 and the partition is at the end
  of the disk, grub can not tell whether it is the partition or the
  whole disk that is the raid component, resulting in errors like:

  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).

  This can cause unexpected failure after upgrading from 10.04.

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