Can't remove lv with dmsetup

computerjack · 07-19-2009, 10:06 AM

I am trying to remove a volume group on a single drive that contains a single logical volume. This is on openfiler which I believe is CentOS based.

dmsetup info vg2-backup shows an open count of 1.

Try running dmsetup remove vg2-backup but it fails because it says device or resource busy.

How do I find the process that is tying this up so I can kill it and remove the lv and then volume group?

computerjack · 07-19-2009, 10:28 AM

Figured it out on my own but wanted to share the solution for anyone that happens across this with the same problem.

Ran cat /proc/mounts and saw /dev/vg2/backup was mounted. Did umount /dev/vg2/backup and then ran dmsetup info vg2-backup. Open count was now 0 and I was able to successfully run dmsetup remove command. Followed that up with lvremove and vgremove.