Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Compaq Tru64 UNIX Installation and Configuration Guide

1–2 HSG60 ACS Solution Software Version 8.6 for Compaq Tru64 UNIX Installation and Configuration Guide
Controller Designations A and B
A hardware device that, with proprietary software, facilitates communications between
a host and one or more devices organized in an array. HSG60 family controllers are
examples of array controllers.
The terms A, B, “this controller,” and “other controller,” respectively are used to
distinguish one controller from another in a two-controller (also called dual-redundant)
subsystem. These terms are described more thoroughly in the following sections.
Controllers and cache modules are designated either A or B depending on their
location in the enclosure, as shown in Figure 1–1.
Figure 1–1. Location of controllers and cache modules in a Model 2100 enclosure
Model 2100 Enclosure
1 ECBs
2 Fans
3 EMU
4 Power supplies
5 I/O modules
6 Controller A
7 Controller B
8 Cache module
A
9 Cache module
B
CXO6323C
CXO6323C
1 1 1 1
2 2 2
3
CXO7365A
5
5
5
5
5
5
4 4
8 9
6
7