Cable Configurations For Models 010 And - IBM 7133 Series Service Manual

Cable Configurations for Models 010 and 500

|
| In the diagrams, the SSA connectors are numbered. These connector numbers match
| those shown in "Model 010 Internal Connections" on page 1-17 and "Model 500 Internal
| Connections" on page 1-20.
Simplest Configuration for Models 010 and 500
A 7133 Model 010 or Model 500 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:
When a Model 010 or Model 500 is in this configuration:
The two fan-and-power supply assemblies in the 7133 provide redundant power and
cooling to 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. If the modules are moved to other
slots, they might no longer have the protection of redundant power and cooling.
The cables are described in "SSA Cables" on page 1-43. The internal connections of
Model 010 are shown in "Model 010 Internal Connections" on page 1-17; those of Model
500 are shown in "Model 500 Internal Connections" on page 1-20.
For information about the rules for SSA loops, see the "Rules for SSA Loops" on
page 1-42.
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7133 Service Guide
U s in g sy s te m
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7133 unit
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