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

Using AutoRAID Manager for Windows NT

Performing Disk Array Maintenance Tasks

of the Write Working Set and its impact on performance, refer to the HP SureStore E Disk Array 12H
User's and Service Manual.
To maintain performance, the amount of RAID 0/1 space should equal or exceed the Write Working Set,
resulting in a Working Set value less than or equal to 1. A Working Set value greater than 1 indicates that
the Write Working Set is larger than the available RAID 0/1 space and the disk array is servicing writes
from RAID 5 space.
If the Working Set consistently exceeds 1, the amount of RAID 0 /1 space available should be increased to
improve performance. This can be accomplished in several ways as described in the following section.
If the Working Set is consistently much less than 1, some of the RAID 0/1 capacity can be allocated to a
new logical drive without impacting performance. The remaining RAID 0/1 space should be adequate to
accommodate the Write Working Set.
Performing Disk Array Maintenance Tasks
There are a number of tasks that may have to be performed in the ongoing management of the disk array.
These maintenance tasks are typically performed infrequently and may involve taking the disk array offline.

Shutting Down the Disk Array

Shutting down the disk array makes the array unavailable to the server. When a shutdown is initiated, the
disk array completes any I/Os in progress with the server, performs internal housekeeping functions, and
then takes itself offline.
Shutdown is intended primarily as a maintenance operation and does not need to be done on a regular basis.
To shutdown the disk array:
1. Alert all users that the disk array is being shutdown and any data on it will not be available.
2. Right-click the disk array from the Detail pane.
3. Click Properties.
4. Click the Diagnostics tab.
5. Under Array, click Shutdown.
6. Click OK to confirm the Shutdown.
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