Specifying whether to perform volume backup and the kind of device to use

DFSMShsm can use either tape or DASD as target volumes for backup. In the example system, all backup is to tape outside of a system-managed tape library. The BACKUP parameter of the SETSYS command controls whether a host is allowed to do backup and dump processing and limits the kind of device to use as target volumes. In the example system, the following SETSYS command is added to the ARCCMDxx member in each host: 
SETSYS BACKUP(TAPE(ACL))

The BACKUP parameter specifies to DFSMShsm that the host is allowed to perform backup and dump processing. The TAPE(ACL) subparameter specifies that backup versions are to be written to tapes mounted on the devices associated with the ACL esoteric name.

The SETSYS command has a DENSITY parameter that is related to mounting a scratch backup tape for the backup unit. However, when the tape unit specified is a cartridge-type device, DFSMShsm ignores the DENSITY parameter.

To prevent the host from performing backup, you would use the NOBACKUP parameter, which prevents both automatic and command backup processing from occurring. The NOBACKUP parameter also prevents automatic and command dump from occurring.

Related reading

For information about how to direct volume backup to a tape library, see z/OS DFSMShsm Implementation and Customization Guide.

Parent topic: Backup tasks