Chapter 4. Operating The Storage Server; Turning The Storage Server On And Off - IBM TotalStorage DS4100 Installation, User's, And Maintenance Manual

Chapter 4. Operating the storage server

To ensure optimal operation of your system, always follow these best practices
guidelines:
v Back up the data on your storage drives periodically.
v DS4100 base storage server only: To maintain power redundancy, plug the
v Before any planned system shutdown or after any system additions, removals, or
v Ensure that your system is in an optimal state before you shut it down. Never
v During any maintenance or attended power-up procedure, carefully follow the
v The storage subsystem supports simultaneous power-up to the system
v A storage system in an optimal state should recover automatically from an

Turning the storage server on and off

This section contains instructions for turning the storage server on and off under
normal and emergency situations.
If you are turning on the storage server after an emergency shutdown or power
outage, see "Restoring power after an emergency shutdown" on page 69.
© Copyright IBM Corp. 2004
storage server's right and the left power supplies into two independent external
power circuits through ac distribution units inside a rack cabinet or directly into
external receptacles. Similarly, the right and left power supplies of the DS4000
storage expansion units attached to the DS4100 should be plugged into the
same two independent external power circuits as the DS4100. This ensures that
the DS4100 and all its attached storage expansion units will have power if only
one power circuit is available. In addition, having all the right or all the left power
supplies plug into the same power circuit will enable the components in the
storage subsystem to power on simultaneously during an unattended restoration
of power. See Figure 56 on page 62 for an example of redundant power
connections.
modifications (including logical drive creations, storage partitioning definitions,
hardware changes, and so on), save the storage subsystem profile as explained
in the DS4000 Storage Manager guide for your operating system. Save the
profile in a location other than the logical drives created for the DS4100 storage
server.
turn the power off if any fault light is lit; be sure to resolve any error conditions
before you shut down the system.
power-up sequence listed in "Turning on the storage server" on page 66. You
should check that each component of the subsystem is powered-on in the proper
order during this entire power-up procedure to ensure that the controller will
optimally access all of your storage subsystems.
components; however, you should always follow the power-up sequence listed in
"Turning on the storage server" on page 66 during any attended power-up
procedure.
unexpected shutdown and unattended simultaneous restoration of power to
system components. After power is restored, call IBM support if any of the
following conditions occur:
– The storage subsystem logical drives and arrays are not displayed in the
DS4000 Storage Manager graphical user interface (GUI).
– The storage subsystem logical drives and arrays do not come online.
– The storage subsystem logical drives and arrays seem to be degraded.
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