How do I unlock and/or remove a locked volume?

I recently decided to move a volume group off of a mixed device (SATA+USB)
md raid mirror after encountering the "bio too big" bug (which apparently is
likely to cause data corruption, but is classified as WONTFIX! See
https://bugzilla.redhat.com/show_bug.cgi?idI8162 or
http://lmgtfy.com/?q=bio+too+big+wontfix).

The sequence started to use was:

1. Fail USB drive and remove from the raid mirror (mdadm).
2. Repartition USB drive (parted).
3. Create Physical Volume on USB drive and add to Volume Group (lvm pvcreate
& vgextend).
4. Move Volume Group off of raid mirror (lvm pvmove).
5. Remove raid mirror from Volume Group and stop if being a Physical
Volume (lvm vgreduce & pvremove).
6. Stop raid mirror (mdadm).
7. Repartiton SATA drive (parted).
8. Create new SATA-based Physical Volume and add to Volume Group (lvm
pvcreate & vgextend).
9. Move volume group off USB-based Physical Volume (pvmove).
It was at this point (after a few hours) that the sysem 'hung' and was
totally unresponsive. After powering down and rebooting, I attempted to
abort the pvmove (pvmove --abort) but the system locked up again and I
rebooted a second time. This time, the abort appeared to succeed, but when I
started the pvmove againb I got a message about ignoring the locked volume
'pvmove0'. I proceeded with the remaining step:

10. Remove USB-based Physical Volume from the Volume Group and stop it being
a Physical Volume (lvm vgreduce & pvremove)

The system appears to be running OK, but there is a zero-length, locked
Logical Volume which I can't remove.

# lvs -a raid/pvmove0
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
[pvmove0] raid p-C 0

# lvdisplay -a -v raid/pvmove0
Using logical volume(s) on command line
Logical volume
LV Name /dev/raid/pvmove0
VG Name raid
LV UUID 2aWJ0g-B5P8-6bAz-zKlk-f4dQ-nwn8-80n12v
LV Write Access read/write
LV Status NOT available
LV Size 0
Current LE 0
Segments 0
Allocation contiguous
Read ahead sectors auto

# tail -n11 /etc/lvm/backup/raid
pvmove0 {
id = "2aWJ0g-B5P8-6bAz-zKlk-f4dQ-nwn8-80n12v"
status = ["READ", "WRITE", "PVMOVE", "LOCKED"]
flags = []
allocation_policy = "contiguous"
segment_count = 0
}
}
}

The volume is locked (as shown from the backup information output) so
"lvremove --force raid/pvmove0" simply complains "Can't remove locked LV
pvmove0", but "pvmove --abort" (which would normally unlock this) does
nothing because no pvmove is in progress.

So the question (as in the subject) is how do I unlock and/or remove a
locked volume?

Thanks.
Derek.


<div>I recently decided to move a volume group off of a mixed device (SATA+USB) md raid mirror after encountering the &quot;bio too big&quot; bug (which apparently is likely to cause data corruption, but is classified as WONTFIX! See <a href="https://bugzilla.redhat.com/show_bu...;>https://bugzilla.redhat.com/show_bug.cgi?id=498162</a> or <a href="http://lmgtfy.com/?q=bio+too+big+wo...t;>http://lmgtfy.com/?q=bio+too+big+wontfix</a>).</div>
<div> </div><div>The sequence started to use was:</div><div> </div><div>1. Fail USB drive and remove from the raid mirror (mdadm).</div><div>2. Repartition USB drive (parted).</div><div>3. Create Physical Volume on USB drive and add to Volume Group (lvm pvcreate &amp; vgextend).</div>
<div>4. Move Volume Group off of raid mirror (lvm pvmove).</div><div>5. Remove raid mirror from Volume Group and stop if being a Physical Volume (lvm vgreduce &amp; pvremove).</div><div>6. Stop raid mirror (mdadm).</div><div>
7. Repartiton SATA drive (parted).</div><div>8. Create new SATA-based Physical Volume and add to Volume Group (lvm pvcreate &amp; vgextend).</div><div>9. Move volume group off USB-based Physical Volume (pvmove).</div><div>
It was at this point (after a few hours) that the sysem &#39;hung&#39; and was totally unresponsive. After powering down and rebooting, I attempted to abort the pvmove (pvmove --abort) but the system locked up again and I rebooted a second time. This time, the abort appeared to succeed, but when I started the pvmove againb I got a message about ignoring the locked volume &#39;pvmove0&#39;. I proceeded with the remaining step:</div>
<div> </div><div>10. Remove USB-based Physical Volume from the Volume Group and stop it being a Physical Volume (lvm vgreduce &amp; pvremove)</div><div> </div><div>The system appears to be running OK, but there is a zero-length, locked Logical Volume which I can&#39;t remove.</div>
<div> </div><div><font face="courier new,monospace"># lvs -a raid/pvmove0</font></div><div><font face="courier new,monospace">  LV        VG   Attr   LSize Origin Snap%  Move Log Copy%  Convert</font></div><div><font face="courier new,monospace">  [pvmove0] raid p-C    0</font></div>
<div><font face="courier new,monospace"> </font></div><div><font face="courier new,monospace"># lvdisplay -a -v raid/pvmove0</font></div><div><font face="courier new,monospace">    Using logical volume(s) on command line</font></div>
<div><font face="courier new,monospace">  Logical volume </font></div><div><font face="courier new,monospace">  LV Name                /dev/raid/pvmove0</font></div><div><font face="courier new,monospace">  VG Name                raid</font></div>
<div><font face="courier new,monospace">  LV UUID                2aWJ0g-B5P8-6bAz-zKlk-f4dQ-nwn8-80n12v</font></div><div><font face="courier new,monospace">  LV Write Access        read/write</font></div><div><font face="courier new,monospace">  LV Status              NOT available</font></div>
<div><font face="courier new,monospace">  LV Size                0</font></div><div><font face="courier new,monospace">  Current LE             0</font></div><div><font face="courier new,monospace">  Segments               0</font></div>
<div><font face="courier new,monospace">  Allocation             contiguous</font></div><div><font face="courier new,monospace">  Read ahead sectors     auto</font></div><div><font face="courier new,monospace"> </font></div>
<div><font face="courier new,monospace"># tail -n11 /etc/lvm/backup/raid</font></div><div><font face="courier new,monospace">                pvmove0 {</font></div><div><font face="courier new,monospace">                        id = &quot;2aWJ0g-B5P8-6bAz-zKlk-f4dQ-nwn8-80n12v&quot;</font></div>
<div><font face="courier new,monospace">                        status = [&quot;READ&quot;, &quot;WRITE&quot;, &quot;PVMOVE&quot;, &quot;LOCKED&quot;]</font></div><div><font face="courier new,monospace">                        flags = []</font></div>
<div><font face="courier new,monospace">                        allocation_policy = &quot;contiguous&quot;</font></div><div><font face="courier new,monospace">                        segment_count = 0</font></div><div><font face="courier new,monospace">                }</font></div>
<div><font face="courier new,monospace">        }</font></div><div><font face="courier new,monospace">}</font></div><div> </div><div>The volume is locked (as shown from the backup information output) so &quot;lvremove --force raid/pvmove0&quot;  simply complains &quot;Can&#39;t remove locked LV pvmove0&quot;, but &quot;pvmove --abort&quot; (which would normally unlock this) does nothing because no pvmove is in progress.</div>
<div> </div><div>So the question (as in the subject) is how do I unlock and/or remove a locked volume?</div><div> </div><div>Thanks.</div><div>--</div><div>Derek.</div><div> </div>



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