Comment 11 for bug 533493

(In reply to comment #3)
> It is nice to know what is coming soon. But how can I remove a volume under
> Fedora 16 in a reliable way?

For snapshot volumes, I've been performing the following which has worked reliably for me:

### I have to use "dmsetup remove" to deactivate the snapshots first
### Volume list for dmsetup looks like "vg-vol1 vg-vol2 vg-vol3" etc
### ie dmsetup uses hyphens to separate the VG component from the LV
for SNAPVOL in ${DM_VOLUME_LIST}; do
  printf "Deactivating snapshot volume %s\n" ${SNAPVOL}
  dmsetup remove ${SNAPVOL}
  dmsetup remove ${SNAPVOL}-cow
## for some reason, the copy-on-write devices aren't cleaned up auto-magically
## so I have to remove them auto-manually.
done

## Okay - now we can remove the snapshot logical volumes
## Volume list for lvremove looks like "vg/vol1 vg/vol2 vg/vol3" etc
## ie lvremove uses slashes to separate the VG component from the LV
lvremove -f ${LV_VOLUME_LIST}

The above is taken from a working script I use to snapshot cyrus-imap file systems (after quiescing cyrus first) so that they can be backed up and still let cyrus-imap operate.

I hope this gives you some ideas for your own needs.