HP ProLiant 1500 SMART-2DH Array Controller Reference Guide - Page 169

G-1 Appendix G Recovering from Drive Failure The purpose of fault-tolerant configurations on the SMART-2DH Array Controller is to protect against data loss due to drive failure. Although the SMART-2DH Array Controller firmware is designed to protect against normal drive failure, it is imperative that the system operator perform the correct actions 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 activation of a spare drive, and failure of drives in a mirroring configuration that are not mirrored to one another). Recognizing a Drive Failure A drive failure can be recognized by the system operator in one of several ways: s Amber LED will be illuminated on failed drives in a hot-pluggable tray. This, however, assumes the storage system is powered-on and the SCSI cable is working. Note that the amber LED may be illuminated briefly when a hot-pluggable drive is inserted; this is normal. s Amber LED will be illuminated 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 be illuminated). s A Power-On Self-Test (POST) message will list failed drives whenever the system is restarted (assumes that one or more "good" drives are detected by the controller). (See Appendix E for interpretation of POST messages). s Drive Array Advanced Diagnostics (DAAD) will list all failed drives. An online version on DAAD is also available in NT environments. s Compaq Insight Manager can be used to detect failed drives remotely across a network. SMART-2DH Array Controller Reference Guide Writer: Pamela King Project: SMART-2DH Array Controller Reference Guide Comments: 295469-002 File Name: N-APPG.DOC Last Saved On: 2/27/98 12:09 PM COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED