[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

[John Neffenger]

I just upgraded to Ubuntu 12.10, and now I'm seeing the same message on
boot:

  /scripts/local-top/cryptroot: line 1: can't open
/dev/mapper/p490-root: no such file

The contents of "/var/log/boot.log" and "/etc/crypttab" are below.

/var/log/boot.log:

  Reading all physical volumes.  This may take a while...
  Found volume group "p490" using metadata type lvm2
  3 logical volume(s) in volume group "p490" now active
/scripts/local-top/cryptroot: line 1: can't open /dev/mapper/p490-root: no such file
fsck from util-linux 2.20.1
fsck from util-linux 2.20.1
fsck from util-linux 2.20.1
/dev/mapper/p490-root: clean, 220625/1003680 files, 1770508/4006912 blocks (check after next mount)
/dev/sda1: clean, 263/124496 files, 53854/248832 blocks
/dev/mapper/p490-home: clean, 175868/13721600 files, 17080230/54867968 blocks

/etc/crypttab:

sda5_crypt UUID=497c7a02-64bf-496e-9cff-f0611c8c2490 none luks
sdb3_crypt UUID=e35c4825-3fd1-4145-8b5c-33a6f64172ef none luks,noauto

The system seems to boot normally after the message, though.

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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:
  Confirmed

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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