Array Configuration Overview - HP 201723-B21 - StorageWorks Modular SAN Array 1000 Hard Drive Reference Manual

This also applies if the Array Accelerator is removed from the MSA1000
Controller. When power is restored to the MSA1000 storage system, an
initialization process writes the preserved data to the disk drives. This is
particularly important for data that has been cached by a posted-write operation,
but has not yet been written to the hard drives.
Note:
board is first installed. In this case, a Power-On Self-Test (POST) message will be
displayed on the controller display panel when the controller is powered on, indicating
that the Array Accelerator is temporarily disabled. No action is required on your part,
since the internal circuitry will automatically recharge the batteries. Recharging the
batteries can take up to 4 hours. The MSA1000 Controller will function properly during
this time, although without the performance advantage of the Array Accelerator. When
the batteries are charged to 90 percent of their capacity, the Array Accelerator is
automatically enabled.
Depending on the status of the array accelerator, including a low battery charge,
informational or error messages may be displayed on the controller's LCD panel.
For a listing of cache module LCD messages, see the definitions in the HP
StorageWorks 1000 Modular Smart Array Maintenance and Service Guide.

Array Configuration Overview

Drive array technology distributes data across a series of individual hard drives to
unite these physical drives into one or more higher-performance logical arrays and
volumes. Distributing the data allows for concurrent access from multiple drives
in the array, yielding faster I/O rates than non-arrayed drives. Each logical drive in
the array can be set to a different level of fault tolerance.
Depending on your server's operating system and your preference of user
interfaces, use one of the following provided user interfaces to configure the
storage on the MSA1000:
■
■
For information about these user interfaces, see
HP StorageWorks 1000 Modular Smart Array Reference Guide
The batteries on a new MSA1000 Controller may be discharged when the
Array Configuration Utility (ACU)
Command Line Interface (CLI)
MSA1000 Hardware Components
"MSA1000 Software Tools".
21