Subsequent spill backup volume selection (DASD and tape)
After a volume backup task has obtained a spill backup volume, the task continues to use that volume until the volume becomes full, the spill of the full DASD daily backup volume completes, or certain error conditions occur.
Subsequent DASD spill backup volume selection
Subsequent tape spill backup volume selection
If DFSMShsm cannot find a tape volume meeting the preceding criteria or if you specified SETSYS SELECTVOLUME(SCRATCH), DFSMShsm requests that a scratch tape be mounted on the already allocated unit. When the operator mounts a scratch tape, DFSMShsm assigns it as a tape spill backup volume.
After the operator mounts the volume, DFSMShsm continues moving backup versions to that volume.
Certain error conditions, such as an error in writing on the tape, cause DFSMShsm to switch tape spill backup volumes. If an error occurs, DFSMShsm considers the tape spill backup volume to be full, releases the volume, and selects another tape spill backup volume as described in Initial spill backup volume selection (DASD and tape), but only a tape volume is selected. After DFSMShsm selects a tape spill backup volume for the spilling of a full DASD daily backup volume, it uses only tape spill backup volumes when additional spill backup volumes are required during the current spilling of the full DASD daily backup volume.