Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Linux X86 and Alpha Installation and Configuration Guide

1–6 HSG60 ACS Solution Software Version 8.6 for Linux X86 and Alpha Installation and Configuration Guide
Figure 1–4. Transparent failover−after failover from controller B to controller A
Selecting a Cache Mode
The cache module supports read, read-ahead, write-through, and write-back caching
techniques. The cache technique is selected separately for each unit. For example, you can
enable only read and write-through caching for some units while enabling only write-back
caching for other units.
CXO7035A
Host
port 1
active
Host
port 2
active
D100 D101 D120D0 D1
Host 1
Switch or hub
Host 2
Switch or hub
Host 3
Host
port 1
not
available
Controller A
Controller B
not available
Host
port 2
not
available