|
| 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 |
|
| 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. |
|