Dell PERC 4/SI - Manual (Page 51)

You can use the BIOS Configuration Utility to configure Patrol Read. Dell OpenManage Array Manager and OpenManage System Storage Management cannot
configure Patrol Read. Patrol Read can be started and stopped using MegaPR from within Window and Linux.
Blocked Operations
If any of the following conditions exist, then Patrol Read will not run on any of the affected disks:
l An unconfigured disk (the disk is in the READY state)
l Disks that are members of a logical drive undergoing a reconstruction
l Disks that are members of a logical drive that is currently owned by the peer adapter in a cluster configuration
l Disks that are members of a logical drive undergoing a Background Initialization or Check Consistency
Patrol Read Scheduling Details
The following describes the scheduling details for Patrol Read:
1. The PERC controller default settings sets Patrol Read to Auto mode. The Patrol Read mode can be set to Auto or Manual mode in the BIOS
Configuration Utility.
2. In Auto mode, Patrol Read runs continuously on the system and is scheduled to start a new Patrol Read within four hours after the last iteration is
completed.
3. When Patrol Read Mode is changed from Auto to Manual, Manual Halt, or Disabled, the Next execution will start at: field will be set to N/A.
Configuring Patrol Read
Patrol Read can be set to Manual or Automatic mode. When in Manual mode, the BIOS Configuration Utility can start and stop a Patrol Read iteration. MegaPR
can be used to start and stop a Patrol Read iteration from Linux or Windows.
The BIOS Configuration Utility has options to configure Patrol Read on the controller. Access the Objects→ Adapter→ Patrol Read Options menu. Press
<Enter> to open the Patrol Read submenu, which displays the following items:
l Patrol Read Mode
l Patrol Read Status
l Patrol Read Control
Patrol Read Mode
The current setting displays as Manual/Auto/Disabled. When you select this option, a window opens to display the following options, with the current setting
highlighted:
1. Manual
2. Auto
3. Manual Halt
4. Disabled
You can change the setting by selecting a different value upon confirmation.
Patrol Read Status
When you select Patrol Read Status and press <Enter>, a window opens to display these options:
1. Number of Iterations Completed =