Dell PowerVault MD3820f - Manual (Page 120)

3. From the menu bar, select Storage → Disk Pool → Add Physical Disks (Capacity).
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.
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