DAOPTION(SAMETRK | RELTRK | RELBLK) are mutually exclusive, optional parameters specifying the type of data set accessing required (relative track or relative block) upon recall of a direct access data set. This, in turn, will imply the allowable target volume device types.

SAMETRK specifies that if DFSMShsm is not directed to a volume by the VOLUME parameter, it will select a target volume with the same track length as the last L0 volume from which the data set was migrated. If DFSMShsm is directed to a specific volume by the VOLUME parameter, this volume must have the same track length as the last L0 volume from which the data set was migrated.

Data will be moved as a track-to-track image, accessible for both relative track and relative block processing.

RELTRK specifies that if DFSMShsm is not directed to a volume by the VOLUME parameter, it will attempt to select a target volume with the same track length as the last L0 volume from which the data set was migrated. If no volume with equal track length is available, then the target volume selected may have a larger track length than the last L0 volume. If DFSMShsm is directed to a specific volume by the VOLUME parameter, this volume must have the same or greater track length than the last L0 volume from which the data set was migrated.

Data will be moved as a track-to-track image, accessible by relative track addressing.

RELBLK specifies that if DFSMShsm is not directed to a volume by the VOLUME parameter, it will attempt to select a target volume with the same track length as the last L0 volume from which the data set was migrated. If no volume with equal track length is available, then the target volume selected may have a larger or smaller track length than the last L0 volume. If DFSMShsm is directed to a specific volume by the VOLUME parameter, this volume can have any track length.

Data will be moved to fill out the track, accessible by relative block addressing.