[Bug 776422] Re: [Natty] Grub no longer recognizes raid5 array

[Phillip Susi]

As I said before, the bug is in the bios reporting the size of the disk
wrongly.  Possible workarounds include reverting to the older version of
grub, or upgrading the array to use a 1.x format metadata.

Out of curiosity, what motherboard/bios is this?


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

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https://bugs.launchpad.net/bugs/776422

Title:
  [Natty] Grub no longer recognizes raid5 array

Status in “grub2” package in Ubuntu:
  Opinion

Bug description:
  Binary package hint: grub2

  After upgrading from Maverick to Natty, grub drops to the rescue shell
  complaining about the raid5 array.  It says:

  error: Found two disks with the index 0 for RAID md0
  error: Found two disks with the index 1 for RAID md0
  error: Found two disks with the index 2 for RAID md0
  error: Superfluous RAID member (4 found)
  error: Unknown filesystem

  This is a 4 disk raid5 array that mdadm still recognizes and looks
  fine, with each disk having IDs 0 through 3 respectively.  Despite the
  fact that it complains about the raid, it still shows the LVM logical
  volumes in the output of ls.  The array is the sole LVM PV.