IBM 7133 Series, Service Manual

Page: 60 / 230

Largest Configurations with One 7133 for Models 010 and 500
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.
J10 J9
1
2 3 4 5 6 7 8
J6 J5
16 15 14 13 12 11 10 9
J2
J4
J 1
J3
7133 unit
U s in g s y s te m
A1 A2 B1 B2
For this configuration, three fan-and-power supply assemblies must be present in the
7133.
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.
1-46
7133 Service Guide