Administrator Guide

The Add Physical Disks dialog is displayed. You can view information about:
• The disk pool in the Disk Pool Information area.
• The unassigned physical disks that can be added to the disk pool in the Select physical disks for addition area.
NOTE: The RAID controller module firmware arranges the unassigned physical disk options with the best options
listed at the top in the Select physical disks for addition area.
4. Select one or more physical disks in the Select physical disks for addition area.
The total free capacity that will be added to the disk pool is displayed in the Total usable capacity selected field.
5. Click Add.
Configuring the preservation capacity of a disk
pool
The preservation capacity in a disk pool is reserved for data reconstruction operations in case of physical disk failures.
To configure the preservation capacity in a disk pool:
1. In AMW, select the Storage & Copy Services tab.
2. Select the disk pool.
3. From the menu bar, select Storage > Disk Pool > Change > Settings.
The Change Disk Pool Settings dialog is displayed.
4. In the Preservation Capacity area of the Physical disks dedicated to preservation capacity box, type or select a number of
physical disks.
The preservation capacity of the disk pool is dependent on the number of physical disks in the disk pool.
5. Click OK.
Changing the modification priority of a disk pool
Use the Modification Priority option to specify the priority levels for modification operations in a disk pool relative to the system
performance.
NOTE: Selecting higher priority for modification operations in a disk pool can slow the system performance.
The following are the priority levels to modify a disk pool:
• Degraded Reconstruction Priority — The degraded reconstruction priority level determines the priority of the data reconstruction
operation when a single physical disk fails in a disk pool.
• Critical Reconstruction Priority — The critical reconstruction priority level determines the priority of the data reconstruction
operation when at least two physical disks fail in a disk pool.
• Background Operation Priority — The background operation priority level determines the priority of the disk pool background
operations, such as Virtual Disk Expansion (VDE) and Instant Availability Format (IAF).
To configure alert notifications for a disk pool:
1. In the AMW, select the Storage & Copy Services tab.
2. Select the disk pool.
3. From the menu bar, select Storage > Disk Pool > Change > Settings.
The Change Disk Pool Settings dialog is displayed.
4. In the Modification Priorities area, move the slider bars to select a priority level.
You can choose a priority level for:
• Degraded reconstruction
• Critical reconstruction
• Background operation
You can select one of the following priority levels:
• lowest
• low
• medium
• high
• highest
Disk pools and disk pool virtual disks
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