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Re: [linux-lvm] Unable to remove a pvmove LV



Delian Krustev wrote:

serv0:/# lvdisplay
  --- Logical volume ---
  LV Name                /dev/s0_data/data
  VG Name                s0_data
  LV UUID                Wzs9Lu-5IUj-DK88-UVnZ-QJpj-gHuD-3a01jq
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                1.02 TB
  Current LE             4164
  Segments               23
  Allocation             inherit
  Read ahead sectors     0
  Block device           254:0

  --- Logical volume ---
  LV Name                /dev/s0_data/pvmove0
  VG Name                s0_data
  LV UUID                H8As4Y-m61V-krSa-lGTd-pNRh-Ef1e-UStXSC
  LV Write Access        read/write
  LV Status              NOT available
  LV Size                46.50 GB
  Current LE             186
  Segments               1
  Allocation             contiguous
  Read ahead sectors     0

serv0:/# lvremove -v -f -d /dev/s0_data/pvmove0
    Using logical volume(s) on command line
  Can't remove locked LV pvmove0
serv0:/# pvmove --abort -v
    Finding all volume groups
    Finding volume group "s0_data"

Another way to remove a misbehaving pvmove logical volume is to restore to a metadata config state previous to the pvmove command. The command to do this is vgcfgrestore. This is only possible if you haven't modified the volume group or the logical volume in a way that might cause you to lose something important. For example if you created a new LV and put a filesystem on it *after* a failed or uncleaned pvmove, you CANNOT restore to the config before the pvmove or you'll lose your new LV.

DISCLAIMER: I don't know what happens if you (accidentally?) try to restore metadata that results in removing an active, in use volume group or logical volume. Does anyone have any information about how dangerous this is? Is there a check for active VGs or LVs when restoring previous metadata with vgcfgrestore?


For example, assuming a volume group named "vg0", to see the metadata config history for vg0 use:

vgcfgrestore -l vg0

Look for the desired config before the pvmove command. Let's say the pvmove happened after the vg0_00009.vg metadata backup was stored, then restore that config with:

vgcfgrestore -v --file /etc/lvm/archive/vg0_00009.vg vg0

Be careful what you restore and look at any recent changes carefully before using vgcfgrestore.


Regards,
Randy
--
..:.::::
Randall Jones     GST      NASA Goddard Space Flight Center
HPC Visualization Support       http://hpcvis.gsfc.nasa.gov
Scientific Visualization Studio    http://svs.gsfc.nasa.gov
rajones svs gsfc nasa gov      Code 610.3      301-286-2239


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