SUPER MICRO Computer LSI 2108/2208 user manual Ncq

Page 19

 

 

Chapter 2: Configuring the LSI MegaRAID Settings

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

Description

 

 

Rebuild Rate

The rebuild rate determines the percentage of system re-

 

 

 

sources that will be applied toward rebuilding a drive that

 

 

 

has failed. Enter a number between 1 and 100 to control

 

 

 

the rebuild rate.

 

 

Patrol Read

A patrol read monitors physical disks to find and resolve

 

 

Rate

any problems that may result in disk failure. Enter a num-

 

 

 

ber between 0 and 100 for the patrol read rate.

 

 

BGI Rate

The BGI (Background Initialization) Rate determines the

 

 

 

rate at which virtual drives are initialized in the back-

 

 

 

ground. Enter a number between 0 and 100.

 

 

Cache Flush

Enter a value in the field to specify (in seconds) how often

 

 

Interval

the system will flush the cache memory.

 

 

CC Rate

The CC (Check Consistency) Rate determines the rate at

 

 

 

which consistency check scans are performed on a disk to

 

 

 

determine if data is corrupted. Enter a number between 0

 

 

 

and 100.

 

 

Spinup Drive

Enter a number to control the amount of drives that spin up

 

 

Count

at one time.

 

 

Reconstruction

The reconstruction rate determines the rate at which a

 

 

Rate

virtual drive is reconstructed. Enter a number between 0

 

 

 

and 100.

 

 

Spinup Delay

After the RAID controller completes initialization, the spinup

 

 

 

delay is the initial amount of seconds that pass before the

 

 

 

first disk interrogation request is sent to the array.

 

 

NCQ

Enable NCQ (Native Command Queuing) to increase

 

 

 

the performance of an HDD by allowing it to optimize the

 

 

 

operation sequence in retrieving outstanding requests and

 

 

 

executing read/write commands.

 

 

Spin Down

This item indicates how long a spin-down drive will wait

 

 

Delay Time

before the next command is executed

 

 

Stop CC On

Select Yes to stop a consistency check when an error is

 

 

Error

encountered.

 

 

Schedule CC

Use this item to schedule a consistency check.

 

 

Maintain PD

Enable this feature to track bad PDs (Physical Disk) across

 

 

Fail History

reboot.

 

 

Stop on Error

Enable this feature to stop system POST if an error is

 

 

 

detected.

 

 

Controller

This item enables the controller BIOS. The default is

 

 

BIOS

Enabled.

 

 

Disk Activity

Enable this option if you want disk activity indicated by a

 

 

 

green activity LED. The disks must be installed in an enclo-

 

 

 

sure for this option to work.

 

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Contents USER’S Manual Page Manual Organization About This ManualConventions Used in This Manual Asia-Pacific Contacting SupermicroHeadquarters EuropePreface Table of Contents Overview of the LSI 2108/2208 SAS Controller Features of the LSI 2108/2208 Controller6Gb/s SAS Interface High PerformanceFunctions of the LSI MegaRAID Utility Drive Features Supported by the LSI MegaRAID UtilityRAID 0 Example RAID Levels Supported by the 2108/2208 ControllerRAID 1 Example RAID 5 Example RAID 10 ExampleRAID 6 Example RAID 50 ExampleRAID RAID 6RAID RAID 60 ExamplePage Adapter Selection Using the LSI MegaRAID Configuration UtilityLSI MegaRAID Main Screen LSI Configuration Utility Main ScreenController Information Advanced Software OptionsController Selection Controller PropertiesA.R.T DescriptionNCQ Virtual Drives Scan DevicesVirtual Drive Properties Drives DrivesConfiguration Wizard Add Configuration Adding a ConfigurationAdd Drives Configuring Drives ManuallySpan Definition Virtual Drive Definition Configuration Preview Physical View Logical ViewLogical View Event Information EventsExit