IBM System Storage DS3300, Installation, User'S, And Maintenance Manual

Page: 62 / 140

4. Use the Storage Subsystem Profile or DS3000 Profile to make sure that the
following functions are enabled:
v For all DS3000 models, enable Media Scan both at the controller level and at
the LUN level.
v
For all DS3000 models, enable the read/write cache. In addition, use the
Storage Subsystem Profile to make sure that cache is matched between the
controllers.
Hardware inspection
In addition to the Health Check process, regular hardware inspection and
maintenance helps to support the optimal performance of the DS3300 storage
configuration. Periodically inspect the components of the DS3300 storage
configuration.
For best results, follow these guidelines:
v
Maintain an up-to-date storage subsystem profile for the DS3300 storage
configuration. Save the profile to a server disk that will remain accessible in case
of a DS3300 storage configuration failure. Do not save the profile only to a LUN
in the DS3300 storage subsystem.
v Develop a change-management plan. The plan should include schedules for
updating subsystem firmware and server host software.
Note: Some updates might require storage subsystem downtime.
v
Use applicable IBM-approved cables for all situations. Note in the configuration
documentation whether any cables are not IBM-approved.
v Create and maintain a cabling diagram of the current 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 and other attached devices).
v
Make sure that all controllers and ESMs are correctly seated.
v Make sure that all drives are correctly seated.
v
Make sure that cables are managed correctly.
v Ensure proper air flow and temperature for all components in the storage
configuration.
You can find details about many of these inspection and maintenance
responsibilities in the applicable sections of this document.
In addition to these inspection and maintenance responsibilities, conduct DS3300
training for staff that support DS3300 storage configurations. Although training is not
a part of the Health Check process, training reduces the potential for configuration
problems and contributes to the correct operation of the system.
Turning on the storage subsystem
This section contains instructions for turning on the storage subsystem under
normal situations. “Turning off the storage subsystem” on page 54 contains
instructions for turning off the storage subsystem under normal and emergency
situations. When you turn on and turn off the DS3300, be sure to use the startup
sequence that is described 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 56.
44
System Storage DS3300 Storage Subsystem: Installation, User’s, and Maintenance Guide