If an active duplex pair is ended with DASD fast write active, the resulting simplex volumes may not be true copies. When ending a duplex pair, IDCAMS issues a channel command to deactivate DASD fast write to allow for destage of any DASD fast write data. This attention message is issued when the attempt to deactivate DASD fast write failed (probably because DASD fast write was in pending state from another job). If DASD fast write was on prior to issuing the RESETTOSIMPLEX channel command, then DASD fast write would have been reactivated for the primary of the ended pair.
Processing continues with the attempt to continue ending the duplex pair.
If the device associated with this message is attached via the IBM® 3990 Model 3 or Model 6 Storage Control, see IBM 3990 Operations and Recovery Guide. for detailed recovery actions.
If a true copy was required, another method for the copy will have to be used.
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