[Bug 931929] Re: root on RAID:0 fails to boot

[Thomas Schiex]

To avoid having to type this at each boot, you may edit

  /usr/share/initramfs-tools/scripts/local-top/dmraid

and add a

dmraid -ay

there

Beyond this, I had another problem:

GRUB2 seems to lack the "part_msdos" preload module. I had to

grub-install --modules="part_msdos" --boot-directory=... /dev/mapper/...

after booting on a liveCD and chrooting to the original partition to
avoid the grub rescue screen.

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https://bugs.launchpad.net/bugs/931929

Title:
  root on RAID:0 fails to boot

Status in tools for generating an initramfs:
  New
Status in “initramfs-tools” package in Ubuntu:
  Confirmed

Bug description:
  Once again booting from RAID is broken.

  There were similar bugs in Jaunty, Karmic, and Lucid.
  I don't recall encountering this error in Natty.
  It was definetly not present in Oneiric.

  Steps to reproduce:
  1. Upgrade to Precise (fresh install not tested, but likely has the same problem)
  2. Reboot
  3. Observe failure to find root and drop to busybox

  initramfs is not loading dmraid and therefore fails to boot.

  To work around this, when given the busybox prompt enter:

  dmraid -ay

  and verify that your raid devices are initialized, thn enter:

  exit

  and booting should continue.

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