If more than one target volume is specified, the default allocation technique is to allocate each successive data set processed to the next volume in the list. A second technique of filling each volume in the list before switching to the next volume can be selected by specifying the FILL parameter.
Standard DADSM allocation facilities are used that allow a primary space request to be split into as many as five extents before issuing the SPACE NOT AVAILABLE message. Contiguous space allocation (only one extent allowed) can be requested by specifying the CONTIG parameter on the MOVE or COPY command.
For both MOVE and COPY, no attempt is made to do exact positioning of data sets on the target volume, that is, standard DADSM allocation rules are in effect: the smallest free space extent large enough to contain the new data set is used. This means that for a new pack with the VTOC at the beginning, each data set will be placed as close to the VTOC as possible, moving progressively down the pack. If exact placements for certain data sets are desired, they can be preallocated. CA Disk will ensure that all attributes in the format-1 DSCB are properly set.
Note: When processing VSAM, the MOVE command relies on SRM for volume selection. For more information, see the parameter description for NEWVOLUMES.
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