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v Create and maintain a cabling diagram of the current SAN configuration. Keep
this diagram updated as you make configuration changes, and keep the cabling
diagram available for review.
v Create and maintain a list of other components that are being used within the
cabling diagram (such as the host system, fibre channel switches, and other SAN
attachments).
v Ensure that all ESMs are properly seated.
v Ensure that all drives are properly seated.
v Ensure that all SFP modules are properly seated.
v Confirm fibre channel cable loop size. (IBM specifications call for at least 3-inch
cable loops, but it is recommended that you use 6-inch cable loops or longer.)
v Ensure proper fibre channel cable management.
v Ensure proper air flow and temperature for all components in your EXP810
storage configuration.
Note: You can find details on many of these inspection and maintenance
responsibilities in the appropriate sections of this document.
In addition to these inspection and maintenance responsibilities, IBM also strongly
recommends DS4000 training for staff that supports DS4000 storage configurations.
Although training is not a part of the Health Check process, DS4000 training
reduces the potential for configuration problems and contributes to the overall
health of the system.
Powering on the storage subsystem
This section contains instructions for turning the storage subsystem on under
normal and emergency situations. When you turn on and turn off the DS4500, be
sure to use the startup sequence in this section. If you are turning on the storage
subsystem after an emergency shutdown or power outage, see “Restoring power
after an unexpected shutdown” on page 138.
Turning on the storage subsystem
The following procedure covers two situations:
v The entire storage subsystem has been shut down. (The main circuit breakers for
the cabinet are off.)
v Some storage expansion enclosures are being powered on while others remain
online. (The main circuit breakers for the cabinet are on.) You might encounter
this if you are adding an additional storage expansion enclosure to increase
storage capacity.
Attention:
1. Potential damage to drives - Repeatedly turning the power off and on
without waiting for the drives to spin down can damage the storage
expansion enclosure drives. Always wait at least 70 seconds from when you
turn off the power until you turn it on again.
2. If you are connecting a power cord to a DS4500 Storage Subsystem or
storage expansion enclosure, turn off both of its power switches first. If the
main circuit breaker is off, be sure both power switches are off on each
storage expansion enclosure in the cabinet before turning on the main circuit
breakers.
1.
Are the main circuit breakers turned on?
Chapter 4. Operating the storage subsystem 119