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

[quequotion]

I've updated the description, since the problem isn't limited to
upgrades to precise.

** Description changed:

- Once again booting from RAID is broken.
+ Booting from RAID is often broken after upgrades or fresh installations
+ of Ubuntu.
  
- 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.
+ initramfs is not activating RAID devices.
  
  Steps to reproduce:
- 1. Upgrade to Precise (fresh install not tested, but likely has the same problem)
+ 1. Upgrade or Install Ubuntu on a RAID
  2. Reboot
- 3. Observe failure to find root and drop to busybox
- 
- initramfs is not loading dmraid and therefore fails to boot.
+ 3. Observe failure to find root drive and drop to busybox
  
  To work around this, when given the busybox prompt enter:
  
  dmraid -ay
  
- and verify that your raid devices are initialized, thn enter:
+ Verify that all of your raid devices are initialized, then enter:
  
  exit
  
- and booting should continue.
+ Booting should then continue.
+ 
+ See comment #2 for a persistent (rebootable) workaround.

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

Title:
  root on RAID:0 fails to boot

Status in dmraid:
  New
Status in tools for generating an initramfs:
  Confirmed
Status in udev - /dev/ management daemon:
  New
Status in “initramfs-tools” package in Ubuntu:
  Confirmed

Bug description:
  Booting from RAID is often broken after upgrades or fresh
  installations of Ubuntu.

  initramfs is not activating RAID devices.

  Steps to reproduce:
  1. Upgrade or Install Ubuntu on a RAID
  2. Reboot
  3. Observe failure to find root drive and drop to busybox

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

  dmraid -ay

  Verify that all of your raid devices are initialized, then enter:

  exit

  Booting should then continue.

  See comment #2 for a persistent (rebootable) workaround.

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