Setup guide

10-3Disk Subsystems Cabling Requirements
Put the disks in the increasing order of their bar–code number, starting by the front (slot on
the left hand) and continuing by the rear (slot on the left hand). The loop includes an
adapter on each node.
Additional diagrams illustrate the possible use of Optic Fibre Extender for implementing
Powercluster with 500m distance between peer nodes and peer SSA disk subsystems as an
answer to disaster recovery.
A2
A1
B2
B1
A1
A2
B1
B2
P12
P13
P16
P1
15 14 13 12 pdisks
11 10 9 8
0 1 2 3
4 5 6 7
P9
P8
P5
P4
pdisks
REAR
FRONT
where Pi designates a connector
Node #Y
Node #X
Figure 53. Example of 1 SSA cabinet and 1 adapter per node (one loop).
More information can be found in Bull DPX/20 Escala 7133 SSA Disk Subsystems – Service
Guide.
Mixed Configurations
The following table shows the possible mixing of SSA adapters and number of initiators in
an SSA loop, according to the SSA adapter type.
MCA PCI
MI Type FC 6214 6216 6217 6219 6218 6215
MCA
MSCG021 4-D 6214 2 1+1 – – – –
MCA
MSCU101 4-G 6216 1+1 8 – – – –
MSCU029 4-I 6217 – – 1 – – –
EPC800 MSCG038 4-M 6219 – – – 8 – 8
PCI
MSCG024 4-J 6218 – – – – 1 –
EPC400
EPC1200/A
MSCG039 4-N 6215 – – – 8 – 8
EPC400
EPC1200/A
MSCG036 – – – 8 – 8
Legend: ”FC” = Feature code, ”–” = mix not possible.
Non–array disk drives and not configured for fast–write operations are assumed for sharing
SSA disk subsystems.
Notes:
1. Only MCA adapters (6216) available on EPC800 nodes allows the sharing of SSA
disk subsystems between 2 or more nodes (up to 8 adapters on a loop).