Recovering a migration volume

You can use the RECOVER command to recover a data set to a level 0 volume. The RECOVER command recovers a data set in its original format. Because the migrated copy of a data set is stored in a different format from the original user’s data set, you cannot use the RECOVER command to recover a data set to a migration volume. Depending on whether you use DFSMShsm commands to periodically dump your DASD migration volumes, you can use one of the following procedures to recover an entire migration volume.

Note: These procedures assume that you have been using DFSMShsm to back up data sets because the procedures recover the latest backup version of each data set that was on the migration volume.

Be aware that the latest backup version of each data set might not be identical to the data set that DFSMShsm migrated. For example, the data set might have needed backup when DFSMShsm migrated it, but DFSMShsm did not have a chance to back up the migrated data set before the migration volume became inaccessible.

If you use DFSMShsm’s BACKVOL command to periodically dump your DASD ML2 volumes and use the automatic dump facility to periodically dump your ML1 volumes, perform Procedure 1 to recover the data, mostly to a DASD migration volume.

If you do not dump your DASD migration volumes or need to recover the data sets that were on a tape migration volume and have no alternate tape, perform Procedure 2 to recover all the data to primary volumes. For a discussion of alternate volumes, see Making disaster backup copies of DFSMShsm-owned tape volumes.