CA Disk Merge will now check for volumes in use by other Merge jobs before selecting for processing when you submit multiple Merges using the MAXVOL parameter.
For example when submitting 3 MERGEs with MERGE DYN=DYN1,MAXVOL=100 the first job submitted would select the first 100 DYN1 type Archvols, the second would select the next 100, and the third job would select the next 100, or less if there are not as many.
Note message "2413 MERGE VOLUME LIMIT OF nnn EXCEEDED..." that shows that the MAXVOL count has been reached for this Merge.
Parallel Merge processing has been introduced by CA Disk r12.5 PTF RO37466. More detailed information can be found into the Product Document Change RI37468.