Compaq 3200 manual Recovering from Drive Failure, Recognizing a Drive Failure

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Appendix H

Recovering from Drive Failure

The purpose of fault-tolerant configurations on the Smart Array 3200 Controller is to protect against data loss due to drive failure. Although the Smart Array 3200 Controller firmware is designed to protect against normal drive failure, it is imperative that the correct actions are performed to recover from a drive failure without inadvertently inducing any additional drive failures. Multiple drive failures in the same array generally result in data loss (exceptions include failures following the activation of a spare drive and failure of drives in a mirrored configuration that are not mirrored to one another).

Recognizing a Drive Failure

A drive failure can be recognized in one of several ways:

■Amber LED illuminates on failed drives in a hot-pluggable tray. This, however, assumes that the storage system is powered-on and the SCSI cable is working. Note that the amber LED may illuminate briefly when a hot-pluggable drive is inserted; this is normal.

■Amber LED illuminates on the front of a ProLiant Storage System if failed drives are inside. (Other problems such as fan failure or over- temperature conditions will also cause this LED to illuminate.)

■A Power-On Self-Test (POST) message lists failed drives whenever the system is restarted, assuming that the controller detects one or more “good” drives. (See Appendix I for explanation of POST messages.)

■Array Diagnostic Utility(ADU) lists all failed drives. An online version of ADU is also available in Windows NT environments.

■Compaq Insight Manager can detect failed drives remotely across a network.

Compaq Smart Array 3200 Controller Reference Guide