[Bug 915610] Re: Boot fails with a degraded RAID connected

[Launchpad Bug Tracker]

*** This bug is a duplicate of bug 872220 ***
    https://bugs.launchpad.net/bugs/872220

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: mdadm (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/915610

Title:
  Boot fails with a degraded RAID connected

Status in Ubuntu:
  Confirmed
Status in “mdadm” package in Ubuntu:
  Confirmed

Bug description:
  Status:
  I have 1 HDD with 11.10 installed on and booting fine.

  If I now connect a disk which is part of a RAID the boot fails with
  mdadm complaining about a degraded root.

  This is not satisfying as the RAID is not needed to boot the system,
  and the system hangs during boot when it was uncontrolled powered
  down.This makes it impossible to run the machine unattended.

  In 10.04 and 10.11 the solution was more satisfying as the system
  would boot just fine but mark all HDDs of the RAID it found as SPARE
  and not activate it thusly the system booted just fine and just failed
  to activate the RAID.

  I found some solutions but all would break on an unattended update
  (initramfs or kernel) and thusly again are not satisfying.

  Is there a simple solution to make the system boot just fine as it did
  before in 10.04 and 10.11 and does not break with updates or break the
  updates themselves?

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