[Bug 453276] Re: Deleting partition does not invoke pvremove

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: partman-lvm (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/453276

Title:
  Deleting partition does not invoke pvremove

Status in “partman-lvm” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: partman-lvm

  This is more of a feature request than a bug report, but this sequence
  of steps caused me great confusion. (See
  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/452350) Anyway, I
  figured that the root cause was that deleting a partition does not
  invoke pvremove to clear out the LVM metadata label on that partition.
  Here's what I did:

  - Auto-partition with LVM, which put my LVM partition at the beginning of the disk and my boot partition at the end of the disk.
  - I didn't like the boot partition at the end of disk, so I manually deleted the LVM partition and the boot partition.
  - Manually recreated a boot partition at the beginning of the disk and put the LVM partition after that.
  - pvscan now believes that the boot partition is a physical volume, even though it is not:
  $ sudo pvscan
    Incorrect metadata area header checksum
    PV /dev/sda2 VG root lvm2 [7.22 GB / 724.00 MB free]
    PV /dev/sda1 lvm2 [7.22 GB]
    Total: 2 [14.45 GB] / in use: 1 [7.22 GB] / in no VG: 1 [7.22 GB]

  What seems to have happened is that the boot partition was placed in
  the exact same location as the LVM partition was originally placed
  during the auto-partition. pvscan now sees the vestigial metadata
  label on the boot partition when it scans the partitions. A simple
  'pvremove /dev/sda1' cleared everything up once I figured out what was
  going on.

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