HP StorageWorks 500 G2 Modular Smart Array - Manual (Page 101)

Troubleshooting 101
54 Redundancy Failed Cache DIMMs Mismatch
Type: Error
Description: The cache memory modules on two different controllers are not the
same size. All cache memory modules must be the same size for redundant
mode.
Action:
1. Remove the controller that has halted.
2. Replace the cache memory with the appropriately sized DIMMs.
3. Wait 10 seconds.
4. Reinstall the controller, and be sure that it seats fully in the chassis.
60 No Cache Module Found
Type: Error
Description: The controller requires at least one cache module to operate. The
cache module is not present or it has failed.
Action:
1. Remove the failed controller.
2. Either add a cache module or replace the failed one.
3. Wait 10 seconds.
4. Reinstall the controller, and be sure that it seats fully in the chassis.
If this action does not solve the problem, contact HP support.