
60 IBM BladeCenter JS23 and JS43 Implementation Guide
via the BladeCenter Mid planar. Each DSM has 2 SAS expanders with each
expander connecting to the 6 DASD, one DSM connects to the primary ports of
the DASD while the other expander connects to the secondary port of the DASD.
The A side expander of each DSM is wired to NSSM in switch bay 3 while the B
side expander is wired to the NSSM in switch bay 4.
Figure 3-5 on page 60 shows the supported SAS topology for the IBM
BladeCenter JS23 and JS43 Express on the BCS.
Figure 3-6 on page 61 shows the supported SAS topology for the IBM
BladeCenter JS23 and JS43 Express on the BCH and BCHT.
Figure 3-5 IBM BladeCenter JS23 and JS43 Express BCS SAS Topology
Blade 1 SAS CtrlBlade 1 SAS Ctrl
Blade 2 SAS CtrlBlade 2 SAS Ctrl
Blade 3 SAS CtrlBlade 3 SAS Ctrl
Blade 4 SAS CtrlBlade 4 SAS Ctrl
Blade 5 SAS CtrlBlade 5 SAS Ctrl
Blade 6 SAS CtrlBlade 6 SAS Ctrl
BAY 3
NSSM
SAS Switch
BAY 3
NSSM
SAS Switch
BAY 3
NSSM
SAS Switch
BAY 4
NSSM
SAS Switch
BAY 4
NSSM
SAS Switch
BAY 4
NSSM
SAS Switch
DS3200DS3200
SAS TapeSAS Tape
EXP3000EXP3000
DSS1
DS3200DS3200
External
SAS Ports
External
SAS Ports
External
SAS Ports
x4
x4
x4
x4
x4
x4
x4
x4
B-Side
Expander
A-Side
Expander
DSS2
B-Side
Expander
A-Side
Expander
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