Ongoing - HP 353803-B22 - StorageWorks Modular Smart Array 1000 SAN Starter Installation Manual

• Manual load balancing—Through the ACU or the CLI, indicate the preferred path
(controller ownership) for each LUN. This method is recommended for environments that
are load balancing from the host.

Ongoing

• Periodically check the MSA website for firmware updates and other announcements. HP may
place new versions of MSA controller firmware (or other support items) on the Web. Updates
include fixes to known issues, support for new features, and enhancements of existing features.
For more information, see the MSA1000/1500 firmware updating guide, available on the
Technical documentation page of the MSA1000 website:
• Check the status of the MSA for unexpected issues after updating MSA controller firmware.
Verify the status of the assigned connections, profile types, redundancy settings, and storage
configuration.
• Schedule physical configuration changes during periods of low or no activity in operational
environments. For example, if the system is performing rebuilds, RAID migrations, array
expansions, logical disk extensions, or experiencing heavy I/O, avoid physical changes such as
adding or replacing disk drives, or hot-plugging a controller or any other component. Hot
adding or replacing a controller while under heavy I/O may cause a momentary pause,
performance decrease, or loss of access to the MSA while the new controller is starting up.
When the controller completes the startup process, full functionality is restored.
• When servicing the controller in a single-controller MSA, do the following:
a. Ensure that a known, good backup is available.
b. Schedule a maintenance window.
c. From the servers, stop all access to the MSA.
d. Power off the MSA and disconnect the power cords.
e. Remove the controller for servicing or replacement.
NOTE: After completing the service and re-applying power to the MSA, if necessary, restart the
server to rediscover the connection to the MSA controller.
For more information, see the HP StorageWorks 1000 Modular Smart Array maintenance and
service guide, available on the Technical documentation page of the MSA1000 website:
http://www.hp.com/go/msa1000
• When servicing one (or both) controllers in a dual-controller MSA, do the following:
• If one of the two controllers is marked as failed, remove the failed controller for servicing or
replacement at any time.
• If both controllers are operational and both need servicing, schedule a maintenance window
and perform the service as for a single-controller configuration.
• If both controllers are operational and one needs servicing, do the following to disable and
then service the controller:
24 Installation procedures—All deployments
http://www.hp.com/go/msa1000
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