Force deactivate a logical volume (LVM2)

Is it possible to _force_ deactivate a logical volume in lvm2? I've tried # lvchange -an /dev/vg/foo, but I get LV vg/foo in use: not removing I want to test some raid function(raid 5, inside xen domU) so I need to deactivate the logical volume. Searched google but cannot find something useful..

Alternative to arj

Hello, Could someone please recommend another free/open-source archiver alternative to arj? The basic functions I needed are: - (Important) Higher compression ratio - Able to add "data recovery record" - Able to create real multi-volumes(not just splitting the output, I mean) - Not necess