Changing the delay by recall before taking away a needed ML2 tape from ABACKUP

When a WAIT-type recall needs an ML2 tape currently in use by ABACKUP, recall keeps retrying the access to the tape. If ABACKUP is still using the tape after a delay of ten minutes since recall first found the tape in use, recall signals ABACKUP to give up the tape.

You can change that delay time (in minutes) by issuing the following PATCH command:

 PATCH .MCVT.+49E X'000F'        /* Have wait-type recall   */
                                 /* delay 15 minutes before */
                                 /* taking away a tape from */
                                 /* ABACKUP                  */

By making this a large number (maximum of X'FFFF'), you can prevent recall from taking away a tape from ABACKUP.

The number of passes that ABACKUP can make to delay its uses between passes are patchable as described in Changing the amount of time ABACKUP waits for an ML2 volume to become available.