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macronus
Asked: 2016-07-07 02:40:56 +0800 CST

Locked LVM logical volume in VG with missing PV

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So, I had disk failure and was moving LVs from the failing disk, to the new PVs. Some LVs were moved successfully, some not. Afterwards I ended up with following state: - two locked LVs - volume group with missing PV

When I try to remove PV, I get:

vgreduce --removemissing --force vg3
  Couldn't find device with uuid RQr0HS-17ts-1k6Y-Xnex-IZwi-Y2kM-vCc5mP.
  Removing partial LV var.
  Can't remove locked LV var

lvremove -fff vg3/var
  Couldn't find device with uuid RQr0HS-17ts-1k6Y-Xnex-IZwi-Y2kM-vCc5mP.
  Can't remove locked LV var

pvmove --abort
  Couldn't find device with uuid RQr0HS-17ts-1k6Y-Xnex-IZwi-Y2kM-vCc5mP.
  Cannot change VG vg3 while PVs are missing.
  Consider vgreduce --removemissing.
  Skipping volume group vg3

I also tried executing vcfgbackup and then restore after editing the locks out, but to no avail:

vgcfgrestore --force vg3
  Couldn't find device with uuid RQr0HS-17ts-1k6Y-Xnex-IZwi-Y2kM-vCc5mP.
  Cannot restore Volume Group vg3 with 1 PVs marked as missing.
  Restore failed.

So I went even further, and inserted the disk back - its failed, but it is detectabled for a bit.

vgreduce --removemissing vg3
  /dev/vg3/var: read failed after 0 of 4096 at 9638445056: Input/output error
  /dev/vg3/var: read failed after 0 of 4096 at 9638502400: Input/output error
  WARNING: Partial LV var needs to be repaired or removed.
  WARNING: Partial LV pvmove1 needs to be repaired or removed.
  There are still partial LVs in VG vg3.
  To remove them unconditionally use: vgreduce --removemissing --force.
  Proceeding to remove empty missing PVs.

lvremove -fff vg3/var
  /dev/vg3/var: read failed after 0 of 4096 at 9638445056: Input/output error
  /dev/vg3/var: read failed after 0 of 4096 at 9638502400: Input/output error
  Can't remove locked LV var

pvmove --abort
  /dev/vg3/var: read failed after 0 of 4096 at 9638445056: Input/output error
  /dev/vg3/var: read failed after 0 of 4096 at 9638502400: Input/output error
  Cannot change VG vg3 while PVs are missing.
  Consider vgreduce --removemissing.
  Skipping volume group vg3

And this is the moment, at which I am out of ideas.

linux debian lvm pvmove

1 Answers

  1. Similar to Can't remove volume group, solved this problem by creating a temporary pv with the same uuid:

    UUID="RQr0HS-17ts-1k6Y-Xnex-IZwi-Y2kM-vCc5mP"  # from question
dd if=/dev/zero of=/tmp/tmp.raw bs=1M count=100 
losetup -f
losetup /dev/loop0 /tmp/tmp.raw
pvcreate --norestorefile -u $UUID /dev/loop0   # it has arisen!
killall lvmetad      # so it stops complaining about duplicate uuids
pvremove /dev/loop0  # a clean removal 
losetup -D
pvscan --cache       # to restart lvmetad

    Season with vgreduce etc. if needed.

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