[Bug 1077650] Re: booting from raid in degraded mode ends in endless loop

[Brian Morton]

I did not file a new bug only because it was a system that I was sending
off for production use and I stuck with the non-LVM RAID for
reliability.  I could attempt reproduction on another system, but I'm
pretty sure it will happen on any system with the steps I described.

Note that I didn't attempt to install on a degraded RAID.  It was
already installed.  I was just testing the ability of the system to boot
degraded.  It fails with LVM2.

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https://bugs.launchpad.net/bugs/1077650

Title:
  booting from raid in degraded mode ends in endless loop

Status in “mdadm” package in Ubuntu:
  Confirmed

Bug description:
  Its basically the same as reported here:

  http://efreedom.com/Question/6-103895/Can-Boot-Degraded-Mdadm-Array

  So I just installed a new system, which is supposed to get later on an
  additional disk. For now I created md raid1 devices with one disk
  missing. To get ubuntu booting at all without complaining about a
  missing disk I already added "bootdegraded=yes" to the kernel command
  line. And now it ends in an endless loop of

  unused devices: <none>
  Attempting to start the RAID in degraded mode...
  mdadm: CREATE group disk not found
  Started the RAID in degraded mode.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: initramfs-tools 0.103ubuntu0.2
  ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  ApportVersion: 2.6.1-0ubuntu3
  Architecture: amd64
  Date: Sun Nov 11 16:26:55 2012
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: initramfs-tools
  UpgradeStatus: Upgraded to quantal on 2012-01-08 (308 days ago)

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