ASRock X79 Extreme11 LSI Mega RAID Storage Manager Guide - Page 53
Changing Power Settings
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3. 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 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 drives to find and resolve potential problems that might cause drive 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 drives are initialized "in the background." Background initialization establishes mirroring or parity for a RAID virtual drive while allowing full host access to the virtual drive. 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 drive to determine if the data has become corrupted. The higher the number, the faster the consistency check is performed (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 drive occurs. The higher the number, the faster the reconstruction occurs (and the system I/O rate may be slower as a result). 4. Click Go to accept the new task rates. 5. When the warning message appears, click OK to confirm that you want to change the task rates. Note: 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. Changing Power Settings The RAID controller includes Dimmer Switch™ technology that conserves energy by placing certain available online drives into a powersave mode. In a powersave mode, the drives use less energy, and the fan and the enclosure requires less energy to cool and house the drives. Also, this technology helps avoid application time-outs caused by spin-up delays and drive wear caused by excessive spin-up/down cycles. You can use the Power Settings field in MegaRAID Storage Manager software to choose whether to allow unconfigured drives or hot spares to enter a powersave mode. Note: The Dimmer Switch technology is enabled by default. When they are in the powersave mode, unconfigured drives and drives configured as hot spares (dedicated or global) can be spun down. When spun down, the drives stay in powersave mode except for periodic maintenance, including: • Periodic background media scans (Patrol Read) to find and correct media defects to avoid losing data redundancy (hot spare drives only) • Use of a hot spare to rebuild a degraded drive group (hot spare drives only) DB09-000202-05 37857-02 Configuration Rev. F - May 2011 Copyright © 2011 by LSI Corporation. All rights reserved. Page 53