HSG80 ACS Solution Software V8.6 for IBM AIM Installation and Configuration Guide

Table Of Contents
Planning a Subsystem 17
Figure 16. Transparent failoverafter 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