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If you want to connect more storage expansion enclosures into drive loops A
and B, continue with Step 3; otherwise, go to “Connecting the redundant
EXP500, EXP100, EXP700, or EXP710 drive loop to the DS4500” on page 86.
3. Connect additional storage expansion enclosures to drive loops A and B, as
shown in Figure 62 on page 84.
Starting with the second storage expansion enclosure, connect each additional
storage expansion enclosure into drive loops A and B in the same manner.
Leave the In port on the last storage expansion enclosure in the loop and the
Out port on the first storage expansion enclosure unoccupied.
First storage
expansion enclosure
Third storage
expansion enclosure
Right ESMLeft ESM
Out
Out
In
d3nu4042d
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 61. Connecting two EXP500, EXP100, EXP700, or EXP710 storage expansion
enclosures into redundant drive loop B
Chapter 3. Cabling the storage subsystem 83