Rules For Ssa Loops - IBM Advanced SerialRAID/X Installation Manual

D isk D isk
1 2
Figure 4. SSA Loop with two failed disks

Rules for SSA Loops

For SSA loops that include the IBM Advanced SerialRAID/X Adapter, the following rules
apply:
v Each SSA loop must be connected to a valid pair of connectors on the SSA adapter
(that is, either connectors A1 and A2, or connectors B1 and B2).
v A maximum of 48 disk drives can be connected in a particular SSA loop.
|
v If you are not using RAID-0 arrays, a second pair of adapter connectors can be
| connected in a particular SSA loop. The second adapter must be another IBM
|
Advanced SerialRAID/X Adapter. If an adapter is connected in two SSA loops and
| each loop contains a second adapter, the same two adapters must be in both loops,
|
as shown in Figure 5 on page 35.
34
IBM Advanced SerialRAID/X Adapter: Installation Guide
U s in g sy s te m
A1 A2 B1 B2
D isk D isk D isk D isk
3 4 5
D isk D isk
6 7 8