Can't remove open logical volume

Question

When I try to remove a logical volume I get the message

#lvremove /dev/my-volumes/volume-1 
Can't remove open logical volume "volume-1"

#lvchange -an -v /dev/my-volumes/volume-1 
Using logical volume(s) on command line
/dev/dm-1: read failed after 0 of 4096 at 0: Input/output error
Deactivating logical volume "volume-1"
Found volume group "my-volumes"
LV my-volumes/volume-1 in use: not deactivating

#lvremove -vf /dev/my-volumes/volume-1 
Using logical volume(s) on command line
/dev/dm-1: read failed after 0 of 4096 at 0: Input/output error
Can't remove open logical volume "volume-1"

#lvs
/dev/dm-1: read failed after 0 of 4096 at 0: Input/output error
LV              VG           Attr   LSize   Origin Snap%  Move Log Copy%  Convert
volume-1        my-volumes   -wi-ao  50.00g  

How can I force the removal of this volume?

Thanks, Everett

Answer 1

What does the logical volume contain? Is it a filesystem (I accidentally wrote partition)? Could it be it's mounted? In that case:

umount /dev/my-volumes/volume-1

Does it have any active snapshots?

Edit: try lvchange -an -v /dev/my-volumes/volume-1 and lvremove -vf /dev/my-volumes/volume-1.

Edit 2: please post 'lvs'.

Edit 3: Try this with some other problematic volume. It's not the cleanest option but according to this site it may work, and it's less problematic than rebooting anyway.

dmsetup remove my--volumes-volume--number
lvremove /dev/my-volumes/volume-number

Answer 2

You probably have iet or tgt running (which one depends on what your iscsi_helper value is in /etc/nova/nova.conf, defaults to iet), and the service has an open filehandle. You can check which one by doing something like this (in my case it's tgt)

# fuser /dev/nova-volumes/volume-00000001
/dev/dm-5:           19155

# lsof | grep /dev/dm-5
tgtd      19155            root   12u      BLK              252,5         0t0    2531554 /dev/dm-5

If it's iet, stop the service by doing:

service iscsitarget stop

If it's tgt, stop the service by doing:

service tgt stop

You should then be able to delete your volumes.