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Chapter 3. Cabling the EXP810
After the storage expansion enclosure is installed in its permanent location, you
must cable it to hosts and other storage devices, depending on your hardware
configuration.
This chapter addresses the following cabling and configuration topics:
v "Enclosure ID settings "
v "Fibre channel loop and ID settings" on page 42
v "Cabling the EXP810" on page 42
v "Installing SFP modules" on page 43
v "Removing SFP modules" on page 45
v "Handling fibre-optic cables" on page 46
v "Using LC-LC fibre-channel cables" on page 47
v "Cabling the EXP810 to a storage subsystem" on page 51
v "EXP810 loop redundancy" on page 53
v "Intermixing the EXP810, EXP710, and EXP100 in the same drive loop" on page
v "Cabling the ac power supply" on page 61
v "Cabling the dc power supply" on page 62
Enclosure ID settings
The enclosure ID, comprised of a pair of seven-segment numbers (referred to x10
and x1 digits), is located on the back of each ESM next to the indicator lights. It
provides a unique identifier for each module in the storage subsystem. Each
storage expansion enclosure (including the DS4000 storage subsystems with
internal drive slots) in the DS4000 storage subsystem configuration must have a
unique storage enclosure ID in the DS4000 subsystem configuration. In addition,
the single digits (x1) of the Enclosure IDs of all enclosures (including the DS4000
and storage subsystems with internal drive slots) in the redundant drive
channel/loop pair must be unique.
The DS4000 controller firmware and storage expansion enclosure ESM
automatically set the enclosure ID number. You can change the setting through the
storage management software if necessary. Both ESM enclosure ID numbers are
identical under normal operating conditions.
Note: If the enclosure ID has not been automatically set, you have to set it
The allowable ranges for enclosure ID settings are 0-99. However, IBM
recommends that you do not set the enclosure ID to 00 or any number greater than
80 because DS4000 storage subsystem enclosure IDs are set in this range. In
addition, you must ensure that the single-digit (x1) of the enclosure ID for every
enclosure in a redundant drive loop pair is unique. (This also includes any storage
subsystem that has drives installed.)
Figure 21 on page 42 shows the enclosure ID.
© Copyright IBM Corp. 2006, 2009
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manually through the software. To set the enclosure ID, see the Storage
Manager Online Help.
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