HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide (EK-G80TS-SA. C01, March 2005)

Troubleshooting Information
52 HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide
Less than
50%
charged.
Less than
50%
charged.
Data loss: None.
Cache policy: Both controllers
support write-through caching
only.
Failover: None.
Data loss: None.
Cache policy: Both controllers
support write-through caching
only.
Failover: None.
Failed. Less than
50%
charged.
Data loss: None.
Cache policy: Both controllers
support write-through caching
only.
Failover: In Transparent Failover,
all units fail over to Controller B
and operate normally.
In Multiple-bus Failover with
host-assist, only those units that
use writeback caching, such as
RAIDsets and mirrorsets, fail over
to Controller B.
In single-controller
configurations, the controller only
provides write-through caching to
the units.
Data loss: None.
Cache policy: Both controllers
support write-through caching
only.
Failover: None.
Failed. Failed. Data loss: None.
Cache policy: Both controllers
support write-through caching
only.
Failover: None. RAIDsets and
mirrorsets become inoperative.
Other units that use writeback
caching operate with
write-through caching only.
No restart occurs.
Data loss: None.
Cache policy: Both controllers
support write-through caching
only.
Failover: None. RAIDsets and
mirrorsets become inoperative.
Other units that use writeback
caching operate with write-through
caching only.
A restart occurs.
Table 9: Resulting Cache Policies—ECB Status (Continued)
ECB Status Cache Policy
Cache A Cache B Unmirrored Cache Mirrored Cache