Restoring the system from the save storage media

When you recover your system from the Save Storage (SAVSTG) media in a disaster recovery situation, you reset your system to the point when the SAVSTG procedure was run. Your system will not be available for use until the restore process completes successfully.

The disk configuration of the restoring system must be the same as the disk configuration of the saving system. There must be at least as many disk units on the restoring system as there were on the saving system. Each disk unit capacity on the restoring system must be equal to or greater than the capacity of the disk unit on the saving system. Serial numbers and physical addresses do not have to be the same. All disk units that were saved are required for the restore operation.

The restore storage process does not automatically start or stop device parity protection on the restoring system. If you determine that the disk units on the restoring system should be protected with device parity protection, start device parity protection before restoring the SAVSTG tapes.

If your system has mirrored protection now, when the restore storage procedure runs, your system will not have mirrored protection on any auxiliary storage pool (ASP).

Find these things before you begin:

  • The list of all the Licensed Internal Code fixes applied to your system at the time you saved storage. This list should be attached to your backup log or found with the SAVSTG tapes.
  • If you applied any Program Temporary Fixes (PTFs) since the last save storage operation, you will need your most recent cumulative PTF tape.
  • A recent Save System (SAVSYS) or Save Configuration (SAVCFG) media volume. The SAVSYS or SAVCFG media contains configuration information that you will have to restore after the restore storage is completed.

Do these things before you begin:

  • Clean the read and write head of the tape unit.
  • Print a list of all the Licensed Internal Code fixes currently on the system. Type the following command and press the Enter key: 
    DSPPTF LICPGM(*ALL) OUTPUT(*PRINT)

Considerations for recovering to a different system:

  • Ensure that your restoring tape drive supports the capabilities of your storage tapes in regard to compression and compaction.
  • Performance on the target system might be different than the source system if you use different disk protection mechanism.
  • In the future you must obtain software license keys for the target system.
Parent topic: Recovering your system