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Top Products
4. In the new pull-down menu, and in the subsequent pull-down menus that
display, select the following topics:
v Computer Storage
v Disk Storage Systems
v TotalStorage DS4000 Midrange Disk Systems & FAStT Stor Srvrs
Note:
During this process a check list displays. Do not check any of the items
in the check list until you complete the selections in the pull-down
menus.
5. When you finish selecting the menu topics, place a check in the box for the
machine type of your DS4000 series product, as well as any other attached
DS4000 series product(s) for which you would like to receive information, then
click Add products. The My Support page opens again.
6. On the My Support page, click the Edit profile tab, then click Subscribe to
email. A pull-down menu displays.
7. In the pull-down menu, select Storage. A check list displays.
8. Place a check in each of the following boxes:
a. Please send these documents by weekly email
b. Downloads and drivers
c. Flashes
d. Any other topics that you may be interested in
Then,
click Update.
9. Click Sign out to log out of My Support.
Best practices guidelines
To ensure optimal operation of your system, always follow these best practices
guidelines:
v Ensure that your system is in an optimal state before you shut it down. Never
turn the power off if any Fault 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 DS4500 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, the right and left power supplies of the DS4000 storage expansion
enclosures attached to the DS4500 should be plugged into the same two
independent external power circuits as the DS4500. This ensures that the
DS4500 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 DS4000
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. Refer to Table 9 on page 16 for
information on 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
Chapter 1. Introduction 5