HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Maintenance and Service Guide (EK-G80MS-SA. C01, March 2005)

Controller and Cache Replacement Troubleshooting
257HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service Guide
Table 15: 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 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 cache
modules in dual-redundant controller configurations” section that starts on
page 139.
5. Complete the instructions for installing a cache module in the “Installing cache
modules in dual-redundant controller configurations” section that starts on
page 142. 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 258.