Windows 2003 Clsuter resource switchover is failed with error "00000960.0000156c::2013/06/18-16:36:43.886 WARN Physical Disk <Disk L:>: Offline, Locking volume failed, error 5."

We have two node Windows 2003 cluster running MS SQL. We have mutiple disk drive resources. Not able to move resource to other node. While moving getting below error in clsuter logs

"

00000960.0000156c::2013/06/18-16:36:43.886 WARN Physical Disk <Disk L:>: Offline, Locking volume failed, error 5."