Before the tapes and tape devices can be accessed via their locations, various preparatory steps must be carried out. Only after the preparatory steps the tapes can be mounted without conflicts and it can be guaranteed that BS2000 and MAREN will operate smoothly together.
Adding a location to the location table
If a system is to access a new location, the new location must be added to the systems location table using the MARENADM statement MODIFY-MAREN-PARAMETERS.
Under VM2000 or in configurations with multiple systems which access shared devices and tapes, the devices should be assigned to the same device depots.
Assignment of tape to location
The tapes are allocated to the locations via their archive numbers using the MARENADM statement MODIFY-VOLUME-ATTRIBUTES. Depending on their use, tapes can reside in three types of location:
HOME-LOCATION = <location-name>
Location at which the tape is usually stored.FREE-LOCATION = <location-name>
Location where the tape is to be relocated when it is transferred to the pool of free tapes after the reservation period has elapsed.TEMPORARY-LOCATION = <location-name>
Current location of the tape.
The three location names are stored by MAREN as catalog entry fields in the MAREN catalog. The MARENADM statement SHOW-VOLUME-ATTRIBUTES outputs information on the locations assigned to the tape.
Assignment of tape devices to location
The ADD-DEVICE-DEPOT command informs the BS2000 NDM of the assignment of the tape devices to the locations. The name of the location must be the same as the location name defined in MAREN.
Device depots must be created using the command ADD-DEVICE-DEPOT each time a BS2000 system is booted.
The SHOW-DEVICE-DEPOT command outputs information on the assignments of tape devices to locations; the REMOVE-DEVICE-DEPOT command cancels the assignments.
When an archive system is used, the mount/dismount specifications should define that tapes are mandatorily unloaded:/MODIFY-MOUNT-PARAMETER UNLOAD-RELEASED-TAPE=*REGARDLESS-OF-USER-REQUEST(TAPE-FAMILY=*MBK)
