Performing Disk Array Maintenance Tasks; Shutting Down The Disk Array; Restarting The Disk Array - HP Surestore Disk Array 12h - And FC60 System Administrator Manual

Using the ARM Command Line Utilities for MPE

Performing Disk Array Maintenance Tasks

Performing Disk Array Maintenance Tasks
There are several tasks that you may have to perform in the on-going management of the disk array. These
maintenance tasks are typically performed infrequently and may involve taking the disk array off line.

Shutting Down the Disk Array

CAUTION! When an array shutdown is performed, the disk array becomes unavailable to
the host system. An array that is shutdown appears to the operating system as if its power
has been turned off. As with any disk subsystem, it is essential that file system access to
the disk array be correctly removed before shutting down or powering off the disk array.
Before an array Shutdown is performed, all mounted file systems mapped to the disk array must be
unmounted. The umount operation synchronizes data in the MPE internal buffers with the data stored on
the disk array.
The disk array must be Shutdown prior to performing any maintenance. The Shutdown process copies vital
data mapping information from the controller NVRAM to the disks. This protects the data mapping
information should the contents of the NVRAM be lost or corrupted due to battery failure. Shutdown then
takes the disk array off line, making all data unavailable to the host. The disk array can still be managed and
tested, but all data is inaccessible while the disk array is Shutdown.
Shutdown is initiated automatically each time the disk array is turned off using the power switch, so it is
usually not necessary to initiate a Shutdown using the ARM utility.
To Shutdown the disk array, type:
arraymgr -s shut <array-id>

Restarting the Disk Array

Following Shutdown, the disk array can be brought back on line by performing a restart. This makes the
data on the disk array available to the host once again.
To restart the disk array, type:
arraymgr -s start <array-id>
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