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If you want to connect a second storage expansion enclosure group, repeat
Step 1 on page 81 through Step 3 on page 83. Otherwise, go to “Connecting
the redundant EXP500, EXP100, EXP700, or EXP710 drive loop to the
DS4500” on page 86. Figure 63 on page 85 shows a second redundant storage
expansion enclosure group (loop C and loop D on storage expansion enclosure
group 2).
First storage
expansion enclosure
Third storage
expansion enclosure
Right ESMLeft ESM
Out
Out
In
d3nu4043c
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
Figure 62. Connecting additional EXP500, EXP100, EXP700, or EXP710 storage expansion
enclosures to drive loops A and B
84 IBM TotalStorage DS4500 Fibre Channel Storage Subsystem: Installation, User’s, and Maintenance Guide