MegaRAID Storage Manager Online Help System

Configuration > Setting Adjustable Task Rates

Setting Adjustable Task Rates

If you want to change the Rebuild rate and other task rates for a controller, you must first log onto the server in All Access mode. (LSI recommends that you not change the adjustable task rates from their defaults.) Then follow these steps to set the adjustable task rates:

  1. Select a controller icon in the left panel, and select the Physical View tab.
  2. In the right panel, select the Operations tab and select Set Adjustable Task Rates.
  3. The task rates appear at the right.
  4. Enter changes, as needed, to any of the task rates:
    • Rebuild Rate. Enter a number from 0 to 100 to control the rate at which a rebuild will be performed on a disk drive when one is necessary. The higher the number, the faster the rebuild will occur (and the system I/O rate may be slower as a result).
    • Patrol Rate. Enter a number from 0 to 100 to control the rate at which patrol reads will be performed. Patrol read monitors physical disks to find and resolve potential problem that might cause disk failure. The higher the number, the faster the patrol read will occur (and the system I/O rate may be slower as a result).
    • Background Initialization (BGI) Rate Enter a number from 0 to 100 to control the rate at which virtual disks are initialized “in the background.” Background initialization makes the virtual disk immediately available for use, even while the initialization is occurring. The higher the number, the faster the initialization will occur (and the system I/O rate may be slower as a result).
    • Check Consistency Rate. Enter a number from 0 to 100 to control the rate at which a consistency check is done. A consistency check scans the consistency data on a fault tolerant virtual disk to determine if the data has become corrupted. The higher the number, the faster the consistency check is done (and the system I/O rate may be slower as a result).
    • Reconstruction Rate. Enter a number from 0 to 100 to control the rate at which reconstruction of a virtual disk occurs. The higher the number, the faster the reconstruction will occur (and the system I/O rate may be slower as a result).
  5. Click Go to accept the new task rates.
  6. When the warning message appears, click OK to confirm that you want to change the task rates.
  7. The Controller Operations tab also has options for disabling or silencing the alarm on the controller. Ordinarily you should leave the alarm enabled so it can warn you of abnormal conditions on the controller. You might need to silence the alarm if, for example, the alarm is malfunctioning and is sounding continuously.


DB09-000202-00  July 2007
Copyright© 2007 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