Compaq 3200 - Manual (Page 181)

H-1
Compaq Smart Array 3200 Controller Reference Guide
Writer: Rickard Project: Compaq Smart Array 3200 Controller Reference Guide Comments: 340862-002
File Name: O-APPH.DOC Last Saved On: 12/7/98 1:47 PM
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
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.