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Attention:
enclosures as shown in Figure 26.
Note: The illustrations in this document might differ slightly from your hardware.
Drive enclosures
Storage server
Drive enclosures
Figure 26. Redundant drive loop cabling overview
Configuring the drive loops
The procedure and illustrations in this section show an example of how to connect
one drive enclosure group of four drive enclosures into a redundant drive loop.
Instructions for how to connect a second redundant drive enclosure group of four
drive enclosures into a redundant drive loop are also included in this procedure.
To complete this procedure, you will need two fiber-optic cables per drive enclosure.
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 radius less than 38 mm (1.5 in.).
1. Connect the first two drive enclosures to drive loop A, as shown in Figure 27 on
®
26
™
IBM
TotalStorage
FAStT700 Fibre Channel Storage Server: Installation Guide
To prevent loss of drive enclosure redundancy, connect the drive
group 1
group 2
page 27.
Starting with the first drive enclosure, connect a fiber-optic cable from the In port
on the left environmental services monitor (ESM) board to the Out port on the
Drive loop A
Drive loop B
Drive loop C
Drive loop D
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