While allocating the data set dsname, the allocation process detected that the data set is currently migrated. If "YOU MAY CONTINUE ..." appears, your session has been placed in a wait state, and the data set is then recalled. You may receive control (return to a nonwait state) without the recall having finished by pressing the ATTENTION key; the recall still happens in the background. Be aware that if the reason for the recall is an immediate need for the data, that data will likely not be available when control is returned to your session before the recall has completed. Therefore, there will likely be a failure in some non-DFSMShsm request.

If "PLEASE RETRY ..." appears, the RECALL command is scheduled, and the request fails with retcode 38, reascode 50 rather than placing the user in a wait state. After RECALL processing completes, retry the request. In either case if the data set is recalled from tape, the operator is requested to mount the tape.

A device type of UNKNOWN means the data set is in incomplete status and cataloged on a primary volume. In this case, DFSMShsm does not know if the data set is recalled from tape or DASD.