In a cluster failover environment when running the DEFINE LIBRARY command, you must set the RESETDRIVES parameter to YES when the SHARED parameter value is NO (a default value).

The RESETDRIVES parameter specifies that the server cleans up the reservation in tape drives after a cluster failover occurrs. For example, host A is a primary host system and host B is a secondary host system in a cluster failover environment. Before failover occurs, host A uses a tape drive. After failover occurrs from host A to host B, host A continues to reserves this tape drive. If the RESETDRIVES parameter is set to NO, host B does not clean up the reservation from this tape drive. Host B no longer has access to this tape drive. If the RESETDRIVES parameter is set to YES, host B cleans up the reservation from this tape drive and can has access to this drive. For more information on the RESETDRIVES parameter, see the DEFINE LIBRARY command.