Since the machine crashes, this is a kernel bug. Can you confirm that you're using a standard ubuntu kernel and which version ?
I don't think the --force is relevant. It's possible that running sync before lvremove would work around the problem - hav eyou tried that ? ** Changed in: lvm2 (Ubuntu) Sourcepackagename: lvm2 => linux-source-2.6.17 -- LVM Snapshot removal causes intermittent kernel panic https://launchpad.net/bugs/71567 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
