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Receiving backup error message while using BRMS

We are using BRMS to backup our iSeries. Here's our backup scenario: We back up a huge library using the parallel save across two 3590 drives. The problem: When we want to restore to a different system that has (BRMS-licensed) one 3590 drive only, it does not allow us to do so. It gives the following error "CPD3824 Serial restore not valid for 'Library' -- system info: V5R2M0."

Taking a closer look at this message gives us the answer to your question:

  
Message ID . . . . . . . . . :   CPD3824                                       
Message file . . . . . . . . :   QCPFMSG                                       
  Library  . . . . . . . . . :     QSYS                                        
                                                                               
Message . . . . :   Serial restore not valid for file &1.                      
Cause . . . . . :   The file on volume &4 &2 &5 was not restored.  The file    
  was saved by a parallel save operation and cannot be used with a serial      
  restore operation.                                                           
Recovery  . . . :   A restore from a parallel save must be a parallel restore  
  operation. Try the restore command again with a media definition object      
  specified that defines all the media files necessary for a parallel restore. 
      

You will need to define a Media Definition Object on the system you wish to restore to and specify it on your RSTOBJ or RSTLIB command.

Here is some information taken from the Backup Recovery Guide V5:

Parallel Restore Operations

Beginning with V4R4M0, you can perform restore operations while using more than one device simultaneously. The data that you restore in this manner must have been saved in parallel format. You can use the Restore Library (RSTLIB) or Restore Object (RSTOBJ) commands in conjunction with a media definition to perform a parallel restore. You can use a media definition with the RSTLIB command to restore *ALLUSR, *IBM, and *NONSYS libraries that were saved with a media definition.

It is possible to restore from a parallel save if you are using fewer devices than save operation used. However, IBM does not recommend this, due to the amount of volume switching that you will need to do. IBM also does not recommend this due to performance reasons. Restore operations that use fewer drives should only be used occasionally to restore individual objects. Restore operations that use fewer drives should never be used as part of a system recovery strategy, or to restore large amounts of data. Whenever possible, the same number of devices that were used during the save operation should be used during a restore operation. A Display Tape (DSPTAP) command displays the list of objects that the system saves across all media files. You only need one media file to display all of the objects that the system saved during a parallel save operation. This list also displays the number of media files that you need to restore data. However, you need all of the media files to restore any of the objects that the system saved. This may include multiple volumes. IBM recommends that you use the same media definition object when saving and restoring the same objects. If you use a different media definition object when restoring, make sure that the same number of media files are defined within that media definition object. If the number of media file definitions is different from number that exists on the storage media, you will receive an error message.

The Info Center has instructions on how to create media definition objects.

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This was last published in August 2004

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