Compaq HSG80 - StorageWorks RAID Array Controller Especificações descarregar pdf (Página 60)

100

101

2–16

Controller and Host Concepts

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 2–3. Resulting Cache Policies and ECB Status (Continued)

ECB Status Cache Policy

Cache A Cache B Unmirrored Cache Mirrored Cache

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 395 396

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