User's Manual

• The physical disk is included in a virtual disk that is currently undergoing one of the following:

– Rebuild

– Reconfiguration or reconstruction

– Background initialization

– Check consistency

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

Related Links

Starting And Stopping Patrol Read

To Set The Patrol Read Mode

Select the desired Patrol Read Mode option. The options available are:

• Auto — Initiates the Patrol Read task. After the task is complete, it automatically runs again within a

specified period. For example, on some controllers the Patrol Read runs every four hours and on

other controllers, the Patrol Read runs every seven days. The Patrol Read task runs continuously on

the system starting again within the specified period after each iteration of the task completes. If the

system reboots while the Patrol Read task is running in Auto mode, the Patrol Read restarts at zero

percent (0%). When the Patrol Read task is set to Auto mode, you cannot start or stop the task. Auto

mode is the default setting.

NOTE: For more information on how often the Patrol Read task runs when in Auto mode, see

your controller documentation.

• Manual — Enables you to start and stop the Patrol Read task using Start and Stop Patrol Read. Setting

the mode to Manual does not initiate the Patrol Read task. If the system reboots while Patrol Read is

running in Manual mode, Patrol Read does not restart.

• Disabled — Prevents the Patrol Read task from running on the system.

To Locate Set Patrol Read Mode In Storage Management

1. In the Server Administrator window, under the system tree, expand Storage to display the controller

objects.

2. Select a controller object.

3. Click Information/Configuration on the controller Properties page.

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

5. Click Execute.

You can also locate this task from the Change Controller Properties drop-down menu.