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1–28 General Description
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-controller 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 1–9 Resulting Cache Policies and ECB Status (Continued)
Cache Module Status Cache Policy
Cache A Cache B Unmirrored Cache Mirrored Cache