ABACKUP needs input volume

If ABACKUP needs the migration tape that is in use by recall, ABACKUP performs retries at 20-second intervals until the tape becomes available. It continues to retry for a period of 30 minutes, whichever occurs first. If the time expires, then the operator has the option to retry or to fail the ABACKUP. There is no takeaway function by ABACKUP from recall.

The ABACKUP function can cause takeaway from recycle input and from TAPECOPY input.

RECYCLE: The recycle function ends the input connected set and moves on to the next best connected set.
TAPECOPY: The TAPECOPY function is optional, and there is a time allowance after the ABACKUP function is first attempted before it initiates the takeaway. This occurs so that the TAPECOPY might complete, rather than discard, its work.

If ABACKUP needs the migration tape that is in use by migration or recycle output, ABACKUP initiates a tape takeaway. It then performs retries at 20 second intervals until the tape becomes available, or for a period of 30 minutes, whichever occurs first. If the time expires, the operator has the option to redo the set of retries or to fail the ABACKUP processing, as described in message ARC6254A.

If ABACKUP needs the migration tape that is in use by another ABACKUP, then it skips processing that tape and proceeds to process other migration and user tapes. It later reattempts to process the tape that was in use.