Connecting The Redundant Exp810 Drive Loop To The Ds4300; Connecting Additional Exp810 Storage Expansion Enclosures To Drive Loops A And B - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

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Fourth storage
expansion enclosure
ESM A
Third storage
expansion enclosure
ESM A
Second storage
expansion enclosure
ESM A
First storage
expansion enclosure
ESM A
Figure 53. Connecting additional EXP810 storage expansion enclosures to drive loops A and
B

Connecting the redundant EXP810 drive loop to the DS4300

After you configure the redundant drive loop using the EXP810 storage expansion
enclosures, use the following procedure to connect a redundant drive loop to the
DS4300 Storage Subsystem. You will need two fiber-optic cables to connect the
redundant drive loop pair (for example, loop A and loop B) to the DS4300 Storage
Subsystem.
1. Connect drive loop A to the DS4300 Storage Subsystem, as shown in Figure 54
on page 70.
Starting with the last (fourth) storage expansion enclosure in loop A, connect
port 1B on the ESM A board to the expansion port located in controller A
module/CRU on the DS4300 Storage Subsystem.
Leave port 1A on the ESM A board on the first EXP810 storage expansion
enclosure unoccupied.
Port 1B Port 1A
EXP810
Port 1B Port 1A
EXP810
Port 1A
Port 1B
Port 1A
EXP810
Port 1A
Port 1B
EXP810
Port 1A
Chapter 3. Cabling the storage subsystem
ESM B
Port 1B
ESM B
Port 1B
ESM B
Loop A
Port 1B
ESM B
Loop B
Port 1B
ds4500_8104
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