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Set Patrol Read Mode

Dell OpenManage™ Server Administrator Storage Management User's Guide

Does my controller support this feature? See "Appendix: Supported Features."

Patrol Read is a feature for identifying disk errors in order to avoid disk failures and data loss or corruption. The Patrol Read only runs on disks that are being used in a virtual disk or that are hot spares.

When possible, the Patrol Read corrects disk errors and restores the integrity of the data. The Patrol Read task runs in the background. When the Patrol Read mode is set to Auto, the Patrol Read is initiated when the controller has been idle for a period of time and when no other background tasks are active. In this circumstance, the Patrol Read feature also enhances system performance as disk errors can be identified and corrected while the disk is not the subject of I/O activity.

The controller adjusts the amount of system resources dedicated to the Patrol Read based on the amount of controller activity that is competing with the Patrol Read task. During heavy controller activity, fewer system resources are dedicated to the Patrol Read task.

The Patrol Read will not run on a physical disk in the following circumstances:

In addition, the Patrol Read suspends during heavy I/O activity and resumes when the I/O is finished.

To set the Patrol Read mode:

Click the radio button for the Patrol Read mode setting that you want to select: The possible settings are:

To locate this task in Storage Management:

  1. Expand the Storage tree object to display the controller objects.

  2. Select a controller object.

  3. Select the Information/Configuration subtab.

  4. Select Set Patrol Read Mode from the Available Tasks drop-down menu.

  5. Click Execute.

Related Information:


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