Compaq HSG80 - StorageWorks RAID Array Controller Specifikace Strana 59

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2–15
Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
Table 2–3. Resulting Cache Policies and ECB Status
ECB Status Cache Policy
Cache A Cache B Unmirrored Cache Mirrored Cache
At least
50%
charged
At least
50%
charged
Data loss: No
Cache policy: Both controllers continue
to support write-back caching.
Failover: No
Data loss: No
Cache policy: Both controllers
continue to support write-back
caching.
Failover: No
Less than
50%
charged
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.
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
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