Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

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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:

In the AMW, select the Storage & Copy Services tab.
Select the disk pool.
From the menu bar, select Storage > Disk Pool > Change > Settings.
The Change Disk Pool Settings dialog is displayed.
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
The higher the priority level, the larger is the impact on host I/O and system performance.