Using Exp810 Storage Expansion Enclosures; Connecting Exp810 In A Redundant Pair Of Drive Loop; Connecting Redundant Exp100, Exp700, Or Exp710 Drive Loops To The Ds4300 - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

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Using EXP810 storage expansion enclosures

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IBM TotalStorage DS4300 Fibre Channel Storage Subsystem: Installation, User's, and Maintenance Guide
Loop A
Figure 49. Connecting redundant EXP100, EXP700, or EXP710 drive loops to the DS4300
The section provides instructions on how to connect one group of four EXP810
storage expansion enclosures in a redundant drive loop. Instructions for how to
connect a second group of four EXP810 storage expansion enclosures in a
redundant drive loop are also included in this procedure. In addition, this procedure
is also applicable when you have any number of enclosures, up to the maximum
number that can be attached in the redundant drive loop pair.
To complete this procedure, you will need two fiber-optic cables per storage
expansion enclosure.
Attention: Handle and install fiber-optic cables properly to avoid degraded
performance or loss of communications with devices. Do not overtighten the cable
straps or bend the cables to a diameter of less than 76 mm (3 in.) or a radius less
than 38 mm (1.5 in.)

Connecting EXP810 in a redundant pair of drive loop

This procedure describes how to cable 16-drive EXP810 storage expansion
enclosure together in a redundant pair of drive loops.
1. Connect the first two storage expansion enclosures to drive loop A, as shown in
Figure 50 on page 67.
Starting with the first storage expansion enclosure, connect a fiber-optic cable
from port 1B on the ESM A board to port 1A on the ESM A board in the second
(next) storage expansion enclosure.
Loop B
d4300_41b