Backing Up Multiple Switched Auxiliary Storage Pool Devices

The example backup control group in the previous section illustrated how the basic system can be backed up. If that system also had switchable auxiliary storage pool devices, you might consider backing them up separately using a different backup control group. The following backup control group could be scheduled to run on the primary system after the SYSTEM backup control group is run. It would not be scheduled to run on the alternate system unless the switch of these auxiliary storage pool devices had occurred. As you can see from the entries, only the user libraries and links on the auxiliary storage pool devices are saved by this backup control group.

Note:

When using a switched auxiliary storage pool device, you need to consider any private authorities that may be defined for objects of these types of devices. All user profiles and all private authorities for objects on auxiliary storage pool devices will be saved with the *SAVSYS or *SAVSECDTA backup items. You need to consider how to restore these private authorities if these authorities have changed while the device was switched to an alternate system. This might require that as part of the recovery, you restore the associated user profiles from the alternate system to the primary system before restoring any objects to the switched auxiliary storage pool device.

When running multiple backup control groups, you need to consider the order these control groups run and which control group manages the restart of subsystems to return from restricted state.

Another not so obvious implication of switched auxiliary storage pool devices is when incremental has been specified for the Weekly Activity. When the auxiliary storage pool device switches to the alternate system, the alternate system will have no history of the switched objects. Therefore the first save of the objects on the switched auxiliary storage pool devices will be a full save rather than an incremental.

                     Edit Backup Control Group Entries               RCHAS400  
 Group . . . . . . . . . . : ASPS  	                                          
 Default activity  . . . . . FIIIIII                                           
 Text  . . . . . . . . . . . Backs up the switched ASPs                        
                                                                               
 Type information, press Enter.                                                
                                                                               
                                  Weekly   Retain Save     SWA                 
      Backup     List ASP         Activity Object While    Message    Sync     
 Seq  Items      Type Device      SMTWTFS  Detail Active   Queue      ID       
                                                                               
   10 *EXIT                       *******                                      
   20 *ALLUSR         PAYROLL     FIIIIII  *YES   *NO                          
   30 *ALLUSR         ACCOUNTS    FIIIIII  *YES   *NO                          
   40 *LINK           PAYROLL     FIIIIII  *YES   *NO                          
   50 *LINK           ACCOUNTS    FIIIIII  *YES   *NO                          
   60 *EXIT                       *******                                      
                                                                               
                                                                               
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 F3=Exit    F5=Refresh    F10=Change item    F11=Display exits                 
 F12=Cancel    F14=Display client omit status    F24=More keys

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