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MegaRAID Storage Manager Online Help System |
Running a Patrol Read
A Patrol Read periodically verifies all sectors of drives connected to a controller, including the system reserved area in the RAID configured drives. Patrol Read works for all RAID levels and for all hotspare drives. A patrol read is initiated only when the controller is idle for a defined period and has no other background activities.
To enable and configure Patrol Read, follow these steps:
- Click a controller icon in the left panel.
- Select the Operations tab in the right panel, and select Set Patrol Read Properties.
- Select an Operation Mode for patrol read. The options are:
- (optional) Specify a maximum count of drives to include in the patrol read. The default number is 255; you can specify a lower number if you wish.
- (optional) Select virtual drives on this controller to exclude from the Patrol Read. The existing virtual drives are listed in the gray box. To exclude a virtual drive, check the box next to it.
- (optional) Select Continuous Patroling
- Enter the frequency at which the Patrol Read will run, in hour, minutes, and seconds.
- Click Go to enable these Patrol Read options.
You can also (optionally) change the patrol read task rate. The task rate determines the amount of system resources that are dedicated to a patrol read when it is running. LSI recommends, however, that you leave the patrol read task rate at its default setting. If you raise the task rate above the default, foreground tasks will run more slowly and it may seem that the system is not responding. If you lower the task rate below the default, rebuilds and other background tasks might run very slowly and might not complete within a reasonable time.
DB09-000202-02 37857-00 Rev. C August 2009 Copyright© 2009 by LSI Corporation. All rights reserved. You can find a list of the LSI U.S. distributors, international distributors, sales offices, and design resource centers on the LSI web site at: http://www.lsi.com/cm/ContactSearch.do |