HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide

Table Of Contents
Planning a Subsystem
1–9HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
1–9
Figure 1–7: Typical multiple-bus configuration
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.
CXO7094B
Host
port 1
active
Host
port 2
active
Host
port 2
active
Host
port 1
active
D100 D101 D120D0 D1 D2
Host 1
"RED"
Controller A
Controller B
All units visible to all ports
FCA1 FCA2
Host 2
"GREY"
FCA1 FCA2
Host 3
"BLUE"
FCA1 FCA2
Switch
or hub
Switch
or hub
NOTE: FCA = Fibre Channel Adapter