z/OS DFSMShsm Implementation and Customization Guide
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Enabling the takeaway function during TAPECOPY processing

z/OS DFSMShsm Implementation and Customization Guide
SC23-6869-01

By default, when a DFSMShsm user needs a data set that resides on a volume that is being read by TAPECOPY processing, that data set cannot be recalled or backed up by ABACKUP function until TAPECOPY processing has completed. During TAPECOPY processing, recalls are tried approximately every two minutes for 30 minutes (15 retries). After 15 retries, DFSMShsm issues message ARC0380A, which requires the operator to respond with WAIT, CANCEL, or MOUNT commands.

DFSMShsm retries the ABACKUP request every twenty seconds for up to 30 minutes (90 retries). After 90 retries, DFSMShsm issues message ARC6254A, which requires the operator to respond with Y (retry again) or N (fail the ABACKUP).

If takeaway from TAPECOPY is enabled, recall tries every two minutes for 15 minutes, and ABACKUP tries every 20 seconds for 15 minutes. Recall or ABACKUP then requests that TAPECOPY end on the needed tape.

To enable the takeaway tape function during TAPECOPY processing, issue the following PATCH command:
 PATCH .MCVT.+53 BITS (.....1..)    

This patch enables RECALL to request that TAPECOPY processing end on the needed tape, but does not do so unless 15 minutes have passed since the first attempt of the recall. DFSMShsm no longer issues message ARC0380A.

You can also change the delay time of 15 minutes. For example, to change the delay time to 20 minutes, issue the following PATCH command:

 PATCH .MCVT.+3CA X'0014'
You can also change the ABACKUP delay time of 15 minutes. For example, to change the delay time to 25 minutes, issue the following command:
 PATCH .ABRCB.+28 XX'0019'

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