Recovery Actions for a System Failure with Manual Restart

The recovery actions assume the operator on SYS2 is to initiate complex recovery.

On SYS2, enter VARY GRS(ALL),RESTART. Enter this command rather than trying to restart specific systems. Enter the VARY command only once. Otherwise, a split ring may be created.

As SYS2 rebuilds the complex, assuming that SYS3 and SYS4 rejoin the complex in that order, the following messages appear as each system rejoins the complex.

On SYS2:

    
  ISG011I SYSTEM SYS2 - RESTARTING GLOBAL RESOURCE SERIALIZATION
  ISG013I SYSTEM SYS2 - RESTARTED GLOBAL RESOURCE SERIALIZATION
  ISG011I SYSTEM SYS3 - RESTARTING GLOBAL RESOURCE SERIALIZATION
  ISG013I SYSTEM SYS3 - RESTARTED GLOBAL RESOURCE SERIALIZATION
  ISG011I SYSTEM SYS4 - RESTARTING GLOBAL RESOURCE SERIALIZATION
  ISG013I SYSTEM SYS4 - RESTARTED GLOBAL RESOURCE SERIALIZATION

On SYS3:

    
  ISG011I SYSTEM SYS3 - RESTARTING GLOBAL RESOURCE SERIALIZATION
  ISG013I SYSTEM SYS3 - RESTARTED GLOBAL RESOURCE SERIALIZATION
  ISG013I SYSTEM SYS4 - RESTARTED GLOBAL RESOURCE SERIALIZATION

On SYS4:

    
  ISG011I SYSTEM SYS4 - RESTARTING GLOBAL RESOURCE SERIALIZATION
  ISG013I SYSTEM SYS4 - RESTARTED GLOBAL RESOURCE SERIALIZATION

On SYS2, after the restart is complete, enter DISPLAY GRS to verify that the systems are active. Determine if the failure on SYS1 requires reIPL or if the operator action stopped SYS1 temporarily.
If the failure is temporary, do the following to recover the system:
1. On SYS1, resume system processing.
2. On SYS2, after determining that SYS1 has resumed processing, enter VARY GRS(SYS1),RESTART.
3. On the active systems, the following messages appear when SYS1 rejoins the complex:
```
    
 ISG011I SYSTEM SYS1 - RESTARTING GLOBAL RESOURCE SERIALIZATION
 ISG013I SYSTEM SYS1 - RESTARTED GLOBAL RESOURCE SERIALIZATION
 
```

If the failure requires reIPL of SYS1, do the following:
1. On an active system, enter VARY GRS(SYS1),PURGE to remove SYS1 from the complex. The following message appears:
```
    
 ISG017D CONFIRM PURGE REQUEST FOR SYSTEM SYS1 - REPLY YES OR NO
 
```
2. If the following appears before ISG013I, the message indicates a possible data integrity exposure.
```
    
 ISG016I SYSTEM SYS1 OWNS OR IS WAITING FOR GLOBAL RESOURCES
 
```
  Notify the system programmer. Give the system log to the system programmer. The system log normally contains messages about the problem. The following message describes any resources that might have been damaged by purging the system:
```
    
 ISG018I REQUESTORS FROM SYSTEM SYS1 HAVE BEEN PURGED FROM
         RESOURCES NAMED xxxx,yyyy
 
```
3. On SYS1, reIPL the system with GRS=JOIN.
4. On the active systems, the following messages appear when SYS1 rejoins the complex:
```
    
 ISG011I SYSTEM SYS1 - JOINING GRS COMPLEX
 ISG004I GRS COMPLEX JOINED BY SYSTEM SYS1
 
```