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 States

Table 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 320-2.

 

 

2.3.13 SCSI Drive States

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.

 

 

 

2-10

Introduction to RAID

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