IBM DS4500 Portable Media Storage User Manual


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First storage
expansion enclosure
Third storage
expansion enclosure
ds454mina
Second storage
expansion enclosure
Fourth (last) storage
expansion enclosure
Loop B
Storage
expansion
enclosure
group 1
Storage
expansion
enclosure
group 2
First storage
expansion enclosure
Third storage
expansion enclosure
Right ESMLeft ESM
Out
Out
In
Right ESMLeft ESM
Out
Out
In
Second storage
expansion enclosure
Right ESMLeft ESM
EXP500/100/7x0
In
In
Out
Out
In
Right ESMLeft ESM
Out
Out
In
Fourth (last) storage
expansion enclosure
In
In
EXP500/100/7x0
EXP500/100/7x0
EXP500/100/7x0
Loop C
Loop D
First storage
expansion enclosure
Third storage
expansion enclosure
Right ESMLeft ESM
Out
Out
In
Right ESMLeft ESM
Out
Out
In
Second storage
expansion enclosure
Right ESMLeft ESM
EXP500/100/7x0
In
In
Out
Out
In
Right ESMLeft ESM
Out
Out
In
Fourth (last) storage
expansion enclosure
In
In
EXP500/100/7x0
EXP500/100/7x0
EXP500/100/7x0
LoopA Loop B
Drive-side
mini hub 1
Drive-side
mini hub 2
Drive-side
mini hub 3
Drive-side
mini hub 4
Figure 58. Redundant drive loop cabling overview — four drive mini hubs
80 IBM TotalStorage DS4500 Fibre Channel Storage Subsystem: Installation, User’s, and Maintenance Guide
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