Installation guide

In loops that have multiple SSA attachments, you can often get best performance if you
connect the SSA attachments as equally as possible between the disk drive modules.
Figure 20 shows one 7133 connected in one loop with two SSA attachments.
The cables are described in “SSA Cables” on page 38. The internal connections of
Model T40 are shown in Note 4b on page 10.
For information about the rules for SSA loops, see Note 4a on page 9.
Figure 21 on page 35 shows three 7133s connected in one loop with six SSA
attachments. The broken line represents optional cables that provide additional
availability if a fault occurs.
2 2 2 2
1 1
7133 unit
4
8
1
12
43215678
9 101112 13141516
13
5
9
16
Using system
A1 A2 B1 B2
Using system
A1 A2 B1 B2
Figure 20. Higher-Availability Configuration (One 7133)
34 7133 Model T40 Installation Guide