[Bug 596554] Re: Unable to mount root LVM partition

[Jan M. Harasym]

I believe I'm experiencing the same (or very similar) bug on 10.04 LTS.

Boot is halted and I'm dropped into a busybox shell, (with the error,
file not found /dev/mapper/<server>-root), I can confirm with busybox
that the block device is there though, I can also mount it (but this
breaks init)

simply pressing ^D brings me to a "Trying to Mount "/" press M for
manual recovery or S to skip this"

pressing "M" brings me to my root filesystem, where I can remount,rw and
navigate all the files I'd expect to be there, I can even start
networking and ssh. (which is the state the machine is in now) however,
I've not had a successful runlevel 5 since this problem started.

the volume behaves exactly as expected in regards to pv/vg/lv-display
from the maintenance shell.

Attempts at recovery;
* rootdelay=60 [kernel boot parameter]
* update initramfs
* reinstalling grub2
* export/import of LVM volume
* restore of LVM config
* fsck the partition (clean)

I'm currently backing all the files up, so I can reinstall, but will
keep the machine around if anybody wants me to try anything.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to udev in Ubuntu.
https://bugs.launchpad.net/bugs/596554

Title:
  Unable to mount root LVM partition

Status in “lvm2” package in Ubuntu:
  Confirmed
Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: initramfs-tools

  Installed Ubuntu using the alternate install CD. Tried both 10.04 and
  10.10 alpha (same results for both). Used guided partition w/LVM.
  (Hence /boot is a normal partition, ext2, / is ext4 on LVM.)

  Upon rebooting the system I was dropped to an initramfs prompt on
  account of the root partition, /dev/mapper/bromine-root not existing.
  However, use of the lvm utility shows no abnormalities (lvdisplay,
  pvdisplay, lvscan and pvscan all print out what I would expect them
  to).

  ls of /dev/mapper shows just a control node. System is unable to boot.

  System in question had previously been running 9.04 with a very
  similar partitioning scheme. Worked perfectly.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/596554/+subscriptions