HSG60 and HSG80 Controller and HSx80 Cache Module Replacement Procedures for Array Controller Software V8.7x-x Release Notes

Troubleshooting
54 HP StorageWorks HSG60 and HSG80 Controller and HSx80 Cache Module Replacement
Procedures for Array Controller Software V8.7x-x Release Notes
Table 4: Resolving a Failed Cache Error Message (Event 1)
Details
Message
%CER-Atop> This controller (replacement) has an invalid cache
module
Resolution
Caution: If the cache has failed, disable mirrored cache to clear the failed
condition. Since unmirroring a controller pair destroys all persistent
reservation bits in the controllers, you must halt all host activity to this
controller pair before proceeding.
Complete the following steps to resolve a failed cache module (event 1) error message.
1. Connect a PC or terminal to the maintenance port of the operational controller if
not already connected.
2. Halt all host I/O activity.
3. Unmount all devices.
4. Complete the instructions for removing a cache module in the “Removing an
HSx80 Cache Module from Dual-Redundant Controller Configurations” section on
page 41.
5. Complete the instructions for installing a cache module in the “Installing an HSx80
Cache Module in Dual-Redundant Controller Configurations” section on page 45.
Doing this causes cache diagnostics to be performed and should repair the bad
cache condition.
6. Display configuration information for both controllers by entering the following
commands:
SHOW THIS_CONTROLLER
SHOW OTHER_CONTROLLER
7. Verify whether the cache and mirrored cache are good (“Cache is GOOD”),
and then complete one the following two options:
■ If the cache is good, return the controller to service. The resolution of the failed
cache condition is complete.
■ If the cache is failed, complete step 8 through step 11 on page 55.