Avago Technologies MegaRAID SATA 150-4 (523) - Manual (Page 27)

RAID Components and Features 2-5
Copyright © 2003–2006 by LSI Logic Corporation. All rights reserved.
2.4.7 Patrol Read
Patrol read involves the review of your system for possible hard drive
errors that could lead to drive failure, then action to correct errors. The
goal is to protect data integrity by detecting physical drive failure before
the failure can damage data. The corrective actions depend on the array
configuration and type of errors.
Patrol read starts only when the controller is idle for a defined period of
time and no other background tasks are active, though it can continue to
run during heavy I/O processes.
You can use the BIOS Configuration Utility to select the patrol read options,
which you can use to set automatic or manual operation, or disable patrol
read. Perform the following steps to select a patrol read option:
Step 1. Select Objects
→
Adapter from the Management Menu.
The Adapter menu displays.
Step 2. Select Patrol Read Options from the Adapter menu.
Step 3. The following options display:
Patrol Read Mode
Patrol Read Status
Patrol Read Control
Step 4. Select Patrol Read Mode to display the patrol read options:
Manual – In manual mode, you must initiate the patrol read.
Auto – In auto mode, the firmware initiates the patrol read on a
scheduled basis.
Manual Halt – Use manual halt to stop the automatic operation,
then switch to manual mode.
Disable – Use this option to disable the patrol read.
Step 5. If you use Manual mode, perform the following steps to initiate
a patrol read:
a. Select Patrol Read Control and press ENTER.
b. Select Start and press ENTER.
Note. Pause/Resume is not a valid operation when Patrol Read
is set to Manual mode.