Patent ID: 6353878
Filing Date: 2002-03-05
Classification: G06F,Y10S

Abstract:
A method of operating a data storage system including a primary data storage subsystem and a secondary data storage subsystem linked to the primary data storage subsystem for transfer of backup data between the primary data storage subsystem and the secondary data storage subsystem, the primary data storage subsystem including a cached disk storage subsystem, the secondary data storage subsystem including a cached disk storage subsystem and a tape library unit for storage of the backup data, said method comprising:a) the secondary data storage subsystem maintaining a directory of versions of backup data stored in the tape library unit; b) the primary data storage subsystem receiving from a host processor a backup media remote control request; c) the primary data storage subsystem sending to the secondary data storage subsystem a backup media remote control command corresponding to the backup media remote control request; and d) the secondary data storage subsystem receiving the backup media remote control command, and the tape library unit executing the backup media remote control command.