[Bug 1874381] Re: LVM device unavailable after 18.04 to 20.04 upgrade Timed out waiting for device /dev/mapper/s5lp8--v g-home

[John George]

I redeployed the system where this failures was original observed and recreated the issue.
Running 'sudo vgck --updatemetadata s5lp8-vg' did work around this bug, when run after the upgrade but prior to the reboot.

Here is the vgdisplay output requested by Steve:

ubuntu at s5lp8:~$ sudo vgdisplay
  --- Volume group ---
  VG Name               s5lp8-vg
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <64.00 GiB
  PE Size               4.00 MiB
  Total PE              16383
  Alloc PE / Size       16377 / 63.97 GiB
  Free  PE / Size       6 / 24.00 MiB
  VG UUID               3B7wkv-AIvn-5A7N-pmWB-7y7h-ylkd-jUIfRd

** Changed in: lvm2 (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1874381

Title:
  LVM device unavailable after 18.04 to 20.04 upgrade Timed out waiting
  for device /dev/mapper/s5lp8--v g-home

Status in Ubuntu on IBM z Systems:
  Confirmed
Status in lvm2 package in Ubuntu:
  Confirmed
Status in lvm2 source package in Focal:
  Confirmed

Bug description:
  After upgrading an LPAR configured with LVM from 18.04 to 20.04 /home is no longer mounted.
  During boot the console shows Timed out waiting for device /dev/mapper/s5lp8--vg-home

  Please see the attached dist-upgrade logs and console output for more
  detail.

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