Note: When you upgrade firmware, you must upgrade all client package
components to the same release level. For example, if you are upgrading
your controller firmware from version 6.x to version 7.x, you must also
upgrade your Storage Manager client to version 10.x or higher. If your
host system uses RDAC, upgrading controller firmware from version 6.x
to version 7.x might also require host software updates, such as RDAC
updates and HBA driver updates. Refer to the IBM System Storage Web
site for detailed instructions.
4. Use the Storage Subsystem Profile or DS5020 Profile to verify that the following
functions are enabled:
vFor the DS5020 and all DS4000 models, Media Scan is enabled both at the
controller level and at the LUN level.
vFor the DS5020 and all DS4000 models, the read/write cache is enabled. In
addition, use the Storage Subsystem Profile to verify that cache is matched
between the controllers.
Web pages
IBM maintains pages on the World Wide Web where you can get the latest
technical information and download device drivers and updates.
For DS5020 and DS4000 information, go to the following Web site:
http://www.ibm.com/systems/support/storage/disk
For the latest information about operating system and HBA support, clustering
support, SAN fabric support, and Storage Manager feature support, see the System
Storage DS5020 and DS4000 Interoperability Matrix at the following Web site:
http://www-1.ibm.com/servers/storage/disk/ds4000/interop-matrix.html
Hardware responsibilities
In addition to the Health Check steps described above, regular hardware inspection
and maintenance helps to support the optimal performance of your DS5020 storage
configuration. Periodically inspect the Fibre Channel components of your DS5020
storage configuration.
The following guidelines are suggested:
vMaintain an up-to-date storage subsystem profile for your DS5020 storage
configuration. Save the profile to a server disk that will remain accessible in case
of a DS5020 storage configuration failure. Do not save the profile only to a LUN
in the DS5020 storage subsystem.
vDevelop a Change Management plan. Include schedules for updating subsystem
firmware and server host software in the plan.
Note: Some updates might require storage subsystem downtime.
vUse IBM-approved Fibre Channel cables for all situations. Note in your
configuration documentation whether any cables are not IBM-approved.
vCreate 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.
vCreate 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).
94 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide