z/OS DFSMShsm Storage Administration to use IBM z/OS DFSMShsm, a component of DFSMS that manages your storage in a ( MB). For additional information on SETSYS parameters reference the DFSMShsm Storage Administration. Reference manual (SC). |. •. HSMSTSYS. Today’s storage arrays offer Automated Storage Tiering features DFSMShsm – A long history of reducing storage cost Administration Guide.

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Availability management of non-SMS-managed storagewhich describes the tasks to be performed and the results of processing for availability management of data sets not managed by SMS. Removes a volume from the list of volumes managed by DFSMShsm and changes existing volume information. Displays the contents of locations within the DFSMShsm address space identified by an absolute address, a relative address, or a qualified address.

Changes the number of backup versions maintained and the frequency of creating backup versions for a non-SMS-managed data set. Backup is the process of copying a data set from a level 0 or storagd ML1 volume storsge daily backup volume.

DFSMShsm Storage Administration Guide

Daily backup volumes are assigned to a specific day in the backup cycle and contain the backup versions created on that day. Requests storate DFSMShsm back up eligible data sets on one or more volumes, in one or more storage groups, or on all primary volumes; or that it back up the control data sets.

DFSMShsm can use these volumes only as daily backup volumes, but DFSMShsm determines which day in the backup cycle the volume storagd be assigned to storagr it first uses the volume. You can define a set of storage groups through the SMS copy pool construct. Space management of SMS-managed storagedescribes the tasks to be performed and the results of processing for space management of data sets managed by the storage management subsystem SMS.


If all copies fail, the full-volume dump is failed. Backs up aggregate groups of user-defined data sets for recovery at another location. This copy is called a backup version.

Restore a data set from a dump copy. Availability management storsge the function of the DFSMShsm program that you use to ensure that your customers can retrieve usable copies of their data sets should their online copies become lost or damaged.

By command, create a fast replication backup of a copy pool.

IBM z/OS DFSMShsm Storage Administration (SC)

Automatically or by command, create a dump copy of a gyide replication DASD backup version By command, recover volumes that have a fast replication backup version. Creates a fast replication backup version for each volume in a specified copy pool. Backup function Backup is the process of copying a data set from a level 0 or an ML1 volume to daily backup volume. Unassigned daily backup volumes are those volumes defined to DFSMShsm as daily backup volumes but not associated with any day in the backup cycle.

DFSMShsm Storage Administration Reference

For example, backup copies of the control data sets should be kept, and the DFSMShsm-owned volumes must be maintained. If DFSMShsm finds any volume without the specified amount of space, it performs migration from all such volumes known as event-driven migration following a space check.

Also causes the data set backup switchtapes action to occur immediately.

Uses fast replication to recover a single volume or a pool of volumes from the managed backup versions. This operation is called automatic primary space management. Restore a volume from a full-volume dump and update the volume from later incremental backup versions.


Data recovery scenarios Data recovery scenariosdescribes real-life examples of data loss and recovery situations. Recover a pool of volumes from the fast replication backup versions on DASD. Recovery from a fast replication backup version can be performed at the copy pool level from a disk copy, at the individual volume level from a disk or tape copy, or at the data set level from a disk or tape copy.

Each dump copy is a complete image of the dumped volume, not just an incremental backup of selected data sets. Deletes all the backup versions or specific backup versions of a specific data set. Replaces references to original tapes with references to alternate tapes.

Tape spill volumes also receive all valid backup versions of data sets when a tape backup volume is recycled.

It describes a variety of situations where data is lost, and what steps to take to recover that data. Recovery and restore of data sets Recovery and restore are processes that are requested only by command, not automatically, for backed up data sets. This function and the following one are known as automatic secondary space management. Note, that the first four commands are only for diagnosis and repair. Automatically recall needed migrated data sets to level 0 volumes.