The specified drive availability status at the library manager has changed from available to unavailable.
The drive status on the server is updated to reflect the availability to that of the library manager. The drive will not be considered as a candidate for the mount or demount request.
Contact your service representative to determine the cause of the drive becoming unavailable. Once the service representative has determined the cause and changed the availability status to available at the library manager, the server will resume use of the drive.