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There was a thunderstorm, the server under Ubuntu 16.04 turned off despite UPS. On the server, the exchange folder (/srv/data) is under samba. The /srv/data mounts a thin volume vg /thinpool/data from LVM.

After a thunderstorm, the volume group (vg) and the volume (data) in particular ceased to be activated. I tried lvconvert --repair vg /thinpool did not help, tried using vgcfrestore to restore the meta, the effect is the same. I need the data very much, there are no backups. I call the LVM guru!

  lvchange -aey vg

  device-mapper: resume ioctl on (252:2) failed: Invalid argument

  Unable to resume vg-thinpool-tpool (252:2)

  device-mapper: resume ioctl on (252:2) failed: Invalid argument

  Unable to resume vg-thinpool-tpool (252:2)



lvs -a

  LV               VG   Attr       LSize   Pool     Origin Data%  Meta%  Move Log Cpy%Sync Convert

  data             vg   Vwi---tz-- 950.00g thinpool                                               

  [lvol0_pmspare]  vg   ewi-------  16.00g                                                        

  thinpool         vg   twi---tz--   1.79t                                                        

  [thinpool_tdata] vg   Twi-a-----   1.79t                                                        

  [thinpool_tmeta] vg   ewi-ao----  16.00g



lvchange -ay -v vg/data

    Using logical volume(s) on command line.

    Activating logical volume "data" exclusively.

    activation/volume_list configuration setting defined: Checking the list to match vg/data

    Loading vg-thinpool_tmeta table (252:0)

    Suppressed vg-thinpool_tmeta (252:0) identical table reload.

    Loading vg-thinpool_tdata table (252:1)

    Suppressed vg-thinpool_tdata (252:1) identical table reload.

    Executing: /usr/sbin/thin_check -q /dev/mapper/vg-thinpool_tmeta

    Creating vg-thinpool-tpool

    Loading vg-thinpool-tpool table (252:3)

    Resuming vg-thinpool-tpool (252:3)

  device-mapper: resume ioctl on (252:3) failed: Недопустимый аргумент

  Unable to resume vg-thinpool-tpool (252:3)

    Removing vg-thinpool-tpool (252:3)



lvconvert --repair vg/thinpool -v

    activation/volume_list configuration setting defined: Checking the list to match vg/lvol1_pmspare

    Creating vg-lvol1_pmspare

    Loading vg-lvol1_pmspare table (252:2)

    Resuming vg-lvol1_pmspare (252:2)

    activation/volume_list configuration setting defined: Checking the list to match vg/thinpool_tmeta

    Executing: /usr/sbin/thin_repair  -i /dev/mapper/vg-thinpool_tmeta -o /dev/mapper/vg-lvol1_pmspare

truncating metadata device to 4161600 4k blocks

    Piping: /usr/sbin/thin_dump /dev/mapper/vg-lvol1_pmspare

  Transaction id 6466 from pool "vg/thinpool" does not match repaired transaction id 6468 from /dev/mapper/vg-lvol1_pmspare.

    Removing vg-thinpool_tmeta (252:0)

    Removing vg-lvol1_pmspare (252:2)

    Preparing pool metadata spare volume for Volume group vg.

    Archiving volume group "vg" metadata (seqno 13499).

    Creating logical volume lvol2

    Creating volume group backup "/etc/lvm/backup/vg" (seqno 13500).

    Activating logical volume "lvol2" locally.

    activation/volume_list configuration setting defined: Checking the list to match vg/lvol2

    Creating vg-lvol2

    Loading vg-lvol2 table (252:0)

    Resuming vg-lvol2 (252:0)

    Initializing 4,00 KiB of logical volume "vg/lvol2" with value 0.

    Temporary logical volume "lvol2" created.

    Removing vg-lvol2 (252:0)

    Renaming lvol2 as pool metadata spare volume lvol2_pmspare.

  WARNING: If everything works, remove "vg/thinpool_meta0".

  WARNING: Use pvmove command to move "vg/thinpool_tmeta" on the best fitting PV.

Workaround for this is to shirk pool meta ( only when it is possible: You have free space in VG, and when meta will fit), e.g.:

thin_dump /dev/mapper/vg02-pool0_tmeta > lvm_meta_dum

lvcreate -n pool0meta2 -L 12G vg02

thin_restore -i lvm_meta_dump -o /dev/mapper/vg02-pool0meta2

lvconvert --thinpool vg02/pool0 --poolmetadata vg02/pool0meta2

See: Fix meta size.