Recovering your data

When recovering data, unmount any partitions that are being recovered during the recovery process to ensure data integrity. There are several ways you can recover your data from a DFSMShsm dump. You can recover an entire volume with DFSMShsm or DFSMSdss. You can also recover a partition from a dump with DFSMShsm or DFSMSdss. To use DFSMSdss to process Linux volumes, see z/OS DFSMSdss Storage Administration. When a volume or partition is recovered, the dump overwrites it; the partition or volume then returns to the state at which the dump was made. All changes since the dump was made are lost. See Data set and partition naming conventions on the data set and partition naming conventions to make sure that the right partition is recovered.

There are some limitations in how you can recover to a Linux volume. For a volume of more than 65536 tracks, you can recover only the full volume from a dump; no individual data sets can be recovered to it with DFSMShsm. However, you can recover a data set to a volume over 65536 tracks from a DFSMShsm dump with DFSMSdss. To use DFSMSdss on Linux volumes and partitions, see z/OS DFSMSdss Storage Administration. Either a full volume or an individual data set can be recovered to a volume of less than 65536 tracks by DFSMShsm. When you recover a data set or volume with DFSMShsm, you must specify the FROMDUMP(DUMPVOLUME(volser)) option. You can list the dump volumes with the LIST DUMPVOLUME command.