HP Array Controller HSG V8.7 Software - Manual (Page 50)

1–26 HSG80 User’s Guide
Failed At least
50%
charged Data loss: No
Cache policy: Controller A
supports write-through caching
only; controller B supports write-
back caching.
Failover: In transparent failover,
all units failover to controller B
and operate normally.
In multiple-bus failover with host-
assist, only those units that use
write-back caching, such as
RAIDsets and mirrorsets, failover
to controller B.
In single configurations, the
controller only provides write-
through caching to its units.
Data loss: No
Cache policy: Both controllers
continue to support write-back
caching.
Failover: No
Less than
50%
charged Less
than
50%
charged Data loss: No
Cache policy: Both controllers
support write-through caching
only.
Failover: No
Data loss: No
Cache policy: Both controllers
support write-through caching only.
Failover: No
Table 1-8 Cache Policies Resulting and ECB Status (Continued)
Cache Module Status Cache Policy
Cache A Cache B Unmirrored Cache Mirrored Cache