IBM 7133 Series, Руководство по обслуживанию

Страница: 67 / 230

|
Largest Configurations with One 7133 for Models 020 and 600
| All 16 disk drive modules in a full 7133 can be connected in one loop. For a balanced
| subsystem, however, it is recommended that two groups of eight disk drive modules be
| connected in two separate loops, each of which is connected to a separate pair of
| connectors on the SSA adapter.
7133 unit
4
8
1
12
4 3 2 1
U s in g s y s te m
A1 A2 B1 B2
5 6 7 8
9 10 11 12 13 14 15 16
13
5
9
16
| All Models 020 and 600 have three fan-and-power supply assemblies, which provide
| redundant power and cooling to all the disk drive modules.
| No improvement in performance is gained if the disk drive modules are moved to other
| slots and connected in more than two loops.
| The cables are described in “SSA Cables” on page 1-43. The internal connections of
| Model 020 are shown in “Model 020 Internal Connections” on page 1-18; those of Model
| 600 are shown in “Model 600 Internal Connections” on page 1-21.
| For information about the rules for SSA loops, see the “Rules for SSA Loops” on
| page 1-42.
Chapter 1. Reference Information
1-53