HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide (EK-G80TS-SA. C01, March 2005)

Troubleshooting Information
50 HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide
Cache
board
failure.
Good. Same as for DIMM failure (see
page 49).
Data loss: Controller A recovers all
of writeback data from the
mirrored copy on Cache B.
Cache policy: Both controllers
support write-through caching
only. Controller B cannot execute
mirrored writes because Cache A
cannot mirror Controller B
unwritten data.
Failover: None
Table 8: Cache Policies—Cache Module Status (Continued)
Cache Module
Status
Cache Policy
Cache A Cache B Unmirrored Cache Mirrored Cache
Table 9: Resulting Cache Policies—ECB Status
ECB Status Cache Policy
Cache A Cache B Unmirrored Cache Mirrored Cache
At least
50%
charged.
At least
50%
charged.
Data loss: None.
Cache policy: Both controllers
continue to support writeback
caching.
Failover: None.
Data loss: None.
Cache policy: Both controllers
continue to support writeback
caching.
Failover: None.