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Steps for connecting storage expansion enclosures to a storage
subsystem
Before you begin, please review the information listed in “General rules and
recommendations for cabling storage expansion enclosures” on page 65.
When connecting storage expansion enclosures to the storage subsystem, use the
following procedure as a general guideline and overview of the connection process:
Note:
The following procedure is for a ″cold-case″ situation (where the DS4500 is
powered down when storage expansion enclosures are connected, as in the
case of initial installation). For a ″hot-case″ scenario (where the DS4500 is
powered on when storage expansion enclosures are connected), refer to the
IBM System Storage DS4000 Hard Drive and Storage Expansion Enclosure
Installation and Migration Guide.
1. Follow the instructions in the Installation, User’s, and Maintenance Guide for
your DS4000 storage expansion enclosure to set up and mount the storage
expansion enclosures.
2. Determine a plan regarding the appropriate number of storage expansion
enclosures you will connect to the DS4500. If you are connecting external
storage expansion enclosures to the DS4500, ensure that the storage
expansion enclosures are populated with at least two drives before you power
them on.
First storage
expansion enclosure
()EXP500/100/7x0
Last storage
expansion enclosure
(EXP500/100/7x0)
ds4500_8111
Right ESMLeft ESM
Out
Out
In
Right ESMLeft ESM
Out
Out
In
In
In
EXP500/100/7x0
EXP500/100/7x0
Other storage
expansion enclosures
Figure 54. Incorrect cabling to the EXP500/EXP100/EXP700/EXP710 ports
Chapter 3. Cabling the storage subsystem 75