Compaq HSG80 - StorageWorks RAID Array Controller Specifiche Scaricare il pdf (Pagina 59)

100

101

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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