Product updates and support notifications
Be sure to download the latest versions of the DS Storage Manager host software,
DS5020 storage subsystem controller firmware, storage expansion enclosure ESM
firmware, and drive firmware at the time of the initial installation and when product
updates become available.
Important: Keep your system up to date with the latest firmware and other product
updates by subscribing to receive support notifications.
For more information about support notifications or the My Support feature,
including instructions on how to register, see the following IBM Support Web page:
http://www.ibm.com/systems/support/storage/subscribe/moreinfo.html
You can also check the Stay Informed section of the IBM Disk Support Web site:
http://www.ibm.com/servers/storage/support/disk/index.html
Best practices guidelines
To achieve optimal system operation, always follow these best practices guidelines:
v Make sure that your system is in an optimal state before you shut it down. Never
turn the power off if any Needs Attention LED is lit; be sure to resolve any error
conditions before you shut down the system.
v Back up the data on your storage drives periodically.
v To maintain power redundancy, plug the DS5020 right and left power supply and
fan units into two independent external power circuits through ac power
distribution units inside a rack cabinet or directly into external receptacles.
Similarly, make sure that the right and left power supplies of the storage
expansion enclosures attached to the DS5020 are plugged into the same two
independent external power circuits as the DS5020. This ensures that the
DS5020 and all its attached storage expansion enclosures will have power in the
event that only one power circuit is available. In addition, having all the right or
all the left power cables plug into the same power circuit enables the devices in
the configuration to power on simultaneously during an unattended restoration of
power.
Note: Do not overload the circuits that power your storage subsystem and
storage expansion enclosures. Use additional pairs of ac power
distribution units (PDUs) if necessary. See “Electrical requirements” on
page 25 for information about storage subsystem power requirements.
Contact your IBM service representative for additional information if
needed.
v Before any planned system shutdown or after any system additions, removals, or
modifications (including firmware updates, logical drive creations, storage
partitioning definitions, hardware changes, and so on), complete the following
tasks:
1. Save the storage subsystem profile
2. Save the storage subsystem configuration
3. Save the Collect All Support Data (CASD).
Make sure that you save the files in a location other than in the logical drives that
were created for the storage subsystem.
6 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide
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