IBM 7133 Series, Руководство по обслуживанию

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Cable Configurations for Models 020 and 600
| In the diagrams, the SSA connectors are numbered. These connector numbers match
| those shown in “Model 020 Internal Connections” on page 1-18 and “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.
|
Simplest Configuration for Models 020 and 600
| A 7133 Model 020 or Model 600 that is in base configuration includes four disk drive
| modules. These modules are installed in the left-hand four slots at the front of the 7133.
| The other 12 disk drive slots contain dummy disk drive modules. The disk drive modules
| are linked in groups of four. Each group of four modules is linked to two external SSA
| connectors.
| In the simplest configuration, the SSA loop is completed by connecting these two SSA
| connectors to one of the two pairs of connectors on an SSA adapter card in the using
| system:
7133 unit
4
5
8
9
1
16
12
13
4 3 2 1
U s in g s y s te m
A1 A2 B1 B2
| 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 one loop.
| 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
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