Connecting Two Exp100, Exp700, Or Exp710 Storage Expansion Enclosures Into Redundant Drive - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

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2. Connect the same first two storage expansion enclosures to drive loop B, as
shown in Figure 46.
Starting with the first storage expansion enclosure, connect a fiber-optic cable
from the In port on the right ESM board to the Out port on the right ESM board
in the second (next) storage expansion enclosure.
In
Left ESM
Fourth (last) storage
expansion enclosure
EXP100/7x0
In
Left ESM
Third storage
expansion enclosure
EXP100/7x0
In
Left ESM
Second storage
expansion enclosure
EXP100/7x0
Loop A
In
Left ESM
First storage
expansion enclosure
EXP100/7x0
Figure 46. Connecting two EXP100, EXP700, or EXP710 storage expansion enclosures into
redundant drive loop B
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
EXP100, EXP700, or EXP710 drive loop to the DS4300" on page 64.
3. Connect additional storage expansion enclosures to drive loops A and B, as
shown in Figure 47 on page 64.
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 of the right ESM on the last storage expansion enclosure in
the loop and the Out port of the left ESM on the first storage expansion
enclosure unoccupied.
In
Out Out
Right ESM
In
Out Out
Right ESM
In
Out Out
Right ESM
In
Out Out
Right ESM
Chapter 3. Cabling the storage subsystem
Loop B
d4300_42d
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