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

[Steffen Neumann]

Thanks James,

I followed the comments in that bug, changed the 85-lvm2.rules,
and verified that the change was present in /lib/udev/rules.d 
inside the initrd. 

I also tried rootdelay=45 and scsi_mod.scan=sync I found 
in other reports, also no change. I have attached an initram debug trace.

Thanks,
Yours,
Steffen

** Attachment added: "Booting with debug kernel option"
   https://bugs.launchpad.net/ubuntu/+source/udev/+bug/596554/+attachment/2691542/+files/initramfs.debug

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https://bugs.launchpad.net/bugs/596554

Title:
  Unable to mount root LVM partition

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

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.

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