totally dedicated to rebuilding the failed drive. The MegaRAID SCSI 320- 2 rebuild rate can be configured between 0% and 100%. At 0%, the rebuild is only done if the system is not doing anything else. At 100%, the rebuild has a higher priority than any other system activity.
2.3.12 Logical Drive StatesTable 2.2 describes the logical drive states.
Table 2.2 | Logical Drive States |
|
|
State | Description |
|
|
Optimal | Drive operating condition is good. All configured drives are |
| online. |
|
|
Degraded | Drive operating condition is not optimal. A configured drive has |
| failed or is offline. |
|
|
Failed | Drive has failed. |
|
|
Offline | Drive is not available to MegaRAID SCSI |
|
|
A SCSI disk drive can be in one of the states described in Table 2.3.
Table 2.3 | SCSI Drive States | |
|
|
|
State |
| Description |
|
|
|
Online |
| The drive is functioning normally and is a part of a configured |
(ONLIN) |
| logical drive. |
|
|
|
Ready |
| The drive is functioning normally but is not part of a |
(READY) |
| configured logical drive and is not designated as a hot spare. |
|
|
|
Hot Spare |
| The drive is powered up and ready for use as a spare in case |
(HOTSP) |
| an online drive fails. |
|
|
|
Fail (FAIL) |
| A fault has occurred in the drive, placing it out of service. |
|
| |
Rebuild (REB) | The drive is being rebuilt with data from a failed drive. | |
|
|
|
Introduction to RAID |
Copyright © 2002 by LSI Logic Corporation. All rights reserved.