[Bug 824961] Re: Ubuntu 11.04 Server with encrypted LVM on dm RAID0 -- Incorrect metadata area header checksum - No volume groups found - ALERT! /dev/mapper/MachineName-root does not exist

[Steve Langasek]

This shouldn't have anything to do with ecryptfs, which is not involved
with LUKS-encrypted devices.

Please show the contents of /conf/conf.d/cryptroot from the initramfs of
the affected system.

** Changed in: cryptsetup (Ubuntu)
       Status: New => Incomplete

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Title:
  Ubuntu 11.04 Server with encrypted LVM on dm RAID0 -- Incorrect
  metadata area header checksum - No volume groups found - ALERT!
  /dev/mapper/MachineName-root does not exist

Status in “cryptsetup” package in Ubuntu:
  Incomplete

Bug description:
  Using Ubuntu 11.04 Server with encrypted LVM and installed the Ubuntu-Desktop GUI installed.
  Unity is Disabled and using Classic Veiw.

  I have encrypted the entire Ubuntu partition and the User /home...
  I have been using this for a couple of weeks now and shutdown everynight.
  I am now for some odd reason maybe the last update broke it; today Aug 11,2011 is the first day I got this issue, I am not sure the cause...
  After booting it asks for my Passphrase to unlock the partition, which I type in but after that I get:

  Enter passphrase: **************************************************************
   Reading all Physical volumes. This may take a while...
   Incorrect metadata area header checksum
   No volume groups found
   Incorrect metadata area header checksum
   No volume groups found
   /scripts/local-top/cryptroot: line 1: can't open /dev/mapper/MachineName-root:no such file
  cryptsetup: isw_abcdefghij_RAID0-1p5_crypt set up successfully

  Next screen:

  udevd-work [79]: inotify_add_watch(6, /dev/dm-5, 10) failed: No such file or directory
   
  udevd-work [79]: inotify_add_watch(6, /dev/dm-3, 10) failed: No such file or directory

  Gave up waiting for root device. Common Problems:
   - Boot args (cat /proc/cmdline)
     - Check rootdelay= (did the system wait long enough?)
     - Check root= (did the system wait for the right device?)
   - Missing modules (cat /proc/modules; ls /dev)
  ALERT! /dev/mapper/MachineName-root does not exist. Dropping to a shell!

  BusyBox v1.17.1 (Ubuntu 1:1.17.1-1-ubuntu1) built-in shell (ash)
  Enter 'help' for a list of built-in commands.

  (inintramfs) ls
  dev		init		conf	lib	var	etc	sys	tmp
  root	lib64	scripts	usr	sbin	bin	proc
  (initramfs) 

  I can not find any files  /var/logs, I can browse /proc and /root and
  ls files in /proc which shows modules and cmdline files that for some
  reason are showing as missing?

  Is there anything I can do like mount the encrypted  partition with a
  Live CD to edit or copy certain files to allow Ubuntu to continue to
  boot up to the Desktop?

  Thanks in advanced.

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