[Bug 224171] Re: Upgrade to 8.04 (Hardy) trashed RAID Array

[Dave Walker]

Hardy release notes have long since passed.  Marking the ubuntu-release-
notes as Invalid.

Thanks.

** Changed in: ubuntu-release-notes
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/224171

Title:
  Upgrade to 8.04 (Hardy) trashed RAID Array

Status in Release Notes for Ubuntu:
  Invalid
Status in “mdadm” package in Ubuntu:
  Invalid

Bug description:
  This issue should be covered in the release notes, but appears not to
  be.

  I was upgrading an Xubuntu based server from 7.10 to 8.04. This system
  ran a 2.6.22-14-server kernel image and had an ATA-133 IDE system disk
  (/dev/hda) and two SATA 320GB disks as a RAID-1 array (/dev/sda1 and
  /dev/sdb1 configured as /dev/md0). The array was defined by an entry
  in mdadm.conf:

  ARRAY /dev/md0 devices=/dev/sda1,/dev/sdb1

  Following the upgrade to the 2.6.24-16-server kernel image, the device names for the disks changed:
  /dev/hda -> /dev/sda
  /dev/sda -> /dev/sdb
  /dev/sdb -> /dev/sdc

  This was not expected and appeared as a failure to assemble the RAID
  array. An attempt to manual start the RAID array brought it up with a
  single disk only (/dev/sdb1). Only by poking around with fdisk was it
  apparent that /dev/sda had a different partition scheme to that
  expected - and was really /dev/hda1.

  This problem was corrected by adding /dev/sdc1 back into the RAID
  array and by updating mdadm.conf. However, the change to device names
  should have been flagged up in the release notes and a warning given
  during the upgrade process. This is probably only one example of how
  an unexpected change to device names can screw up an upgrade.

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