IBM DS3950, Installation, User'S, And Maintenance Manual, Page: 73 / 252

Chapter 3. Cabling the storage subsystem
After the storage subsystem is installed in its permanent location, you must cable it
to hosts, drives, and other external 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 46
v
“Working with SFPs and fiber-optic cables” on page 46
v
“Connecting storage expansion enclosures to the DS3950” on page 55
v
“Connecting hosts to the DS3950 using Fibre Channel host ports” on page 82
v
“Connecting secondary interface cables” on page 78
v
“Configuring the storage subsystem” on page 79
v
“Installing the storage subsystem configuration” on page 92
v “Cabling the ac power supply” on page 92
Enclosure ID settings
The enclosure ID, comprised of two seven-segment numbers, is located on the back
of each controller next to the indicator lights. It provides a unique identifier for
each enclosure in the DS3950 storage subsystem configuration.
The controller automatically sets the enclosure ID number. You can change the
setting through the storage management software if necessary. Both controller
enclosure ID numbers are identical under normal operating conditions. Each
storage expansion enclosure (including the DS3950 storage subsystem) in the
DS3950 storage subsystem configuration must have a unique storage enclosure ID.
In addition, the single digits (x1) of the enclosure IDs of all storage expansion
enclosures and the DS3950 storage subsystem in the redundant drive channel/loop
pair must be unique.
Although the allowable ranges for enclosure ID settings are 0-99, do not set the
enclosure ID to 00 or any number less than 80. The DS3950 enclosure ID is usually
set to a value of 85 before it is shipped.
Figure 23 on page 46 shows the enclosure ID areas.
Note: Your DS3950 hardware might differ slightly from the following illustration.
© Copyright IBM Corp. 2009, 2012
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