IBM DFDSS: Dumping a virtual SNAP target device to tape using ADRDSSU, not with CC option

Summary: Why is Concurrent Copy not used when using ADRDSSU to dump a virtual SNAP target device to tape?

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Instructions

Virtual devices (VDEVs), which are targets of a SNAP operation, are being used as input to the IBM DFDSS utility for dump to tape.

Error msg:

ADR735W (001)-T0MI (06), 2009.199 03:23:02 USE OF CONCURRENT COPY FAILED FOR VOLUME APFI55,014. 
SERIALIZATION WILL BE HELD AND
ARC0640I ARCDVOL1 - CONCURRENT COPY WILL NOT BE USED


Concurrent Copy attempts to put a 00xx SNAP session on the source device of the DFDSS operation. Concurrent Copy is a SNAP NOCOPY operation. The Concurrent Copy operation fails. The reason is published in the TF/Clone Mainframe Snap Facility for z/OS V 10.2.0 Product Guide, pg 90:
 

"A virtual device (VDEV) cannot have a relation with any target device."


The DFDSS copy operation successfully completes, allowing the VDEV to be dumped to tape.

However, Concurrent Copy is not used. A return code of 4 is issued along with a warning message ADR735W for the job.

Affected Products

Mainframe Enablers
Article Properties
Article Number: 000011922
Article Type: How To
Last Modified: 25 Sept 2025
Version:  5
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