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v
To maintain power redundancy, plug the 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 FAStT drive enclosures attached to the FAStT100
should be plugged into the same two independent external power circuits as the
FAStT100. This ensures that the FAStT100 and all its attached drive enclosures
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 enables the
components in the storage subsystem to power on simultaneously during an
unattended restoration of power. See Figure 47 on page 52 for an example of
redundant power connections.
v
Before any planned system shutdown or after any system changes (additions,
removals, or modifications), save controller subsystem profiles as explained in
the storage manager guide for your operating system.
v Ensure that your system is in an optimal state before you shut it down. Never
turn the power off if any fault light is lit; be sure to resolve any error conditions
before you shut down the system.
v
During any maintenance or attended power-up procedure, carefully follow the
power-up sequence listed in “Turning on the storage server” on page 57. Check
that each component of the subsystem is powered-on in the proper order during
this entire power-up procedure to ensure the controller will be able to optimally
access all of your storage subsystems.
v
The storage subsystem supports simultaneous power-up to the system
components; however, you should always follow the power-up sequence listed in
“Turning on the storage server” on page 57 during any attended power-up
procedure.
v A storage system in an optimal state should recover automatically from an
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
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.
Storage server components
The following sections show the components of the storage server.
The hot-swap features of the storage server enable you to remove and replace hard
disk drives, power supplies, RAID controllers, and fans without turning off the
storage server. Therefore, you can maintain the availability of your system while you
remove, install, or replace a hot-swap device.
Hot-swap drive bays
The hot-swap drive bays that are accessible from the front of your storage server
are shown in Figure 2 on page 6.
Chapter 1. Introduction
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