Specifications

2–17
Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
Failed Less than
50%
charged
Data loss: No
Cache policy: Both controllers support
write-through caching only.
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
support write-through caching
only.
Failover: No
Failed Failed Data loss: No
Cache policy: Both controllers support
write-through caching only.
Failover: No. RAIDsets and mirrorsets
become inoperative. Other units that
use write-back caching operate with
write-through caching only.
Data loss: No
Cache policy: Both controllers
support write-through caching
only.
Failover: No. RAIDsets and
mirrorsets become inoperative.
Other units that use write-back
caching operate with write-through
caching only.
Table 2–3. Resulting Cache Policies and ECB Status (Continued)
ECB Status Cache Policy
Cache A Cache B Unmirrored Cache Mirrored Cache