Hard Disk Management 89P 10 11 12RAID Level 5:“Independent Access Array with Rotating Parity”High Data Reliability & Transfer CapacityDisk 2Disk 1Disk 0 Disk 34 5 P 61 2 3 P7 P 98Disk ArrayControllerDATAArray Management SoftwareProvides Logical to Physical MappingPhysicalFigure 21: RAID 5 Array SchematicImproved Write PerformanceThe Image Server uses new designs to improve RAID-5 write performance for both largesequential and small random transactions. This advanced block caching firmware deliversextremely high performance for RAID-5 write operations.Managing Disk ArraysThe Image Server’s Disk Array Configuration Utility provides tools for monitoring andmanaging the disk array. Monitoring and troubleshooting programs automatically check thearray, report problems and provide access to RAID status information and service options.A single drive fault should not cause data loss; but remember: the drive array is degraded andno longer has storage redundancy. Hence, another disk failure may cause a complete loss ofdata and system failure. After a drive failure it is strongly recommended that at the earliest timediagnostics be performed, and the server be taken off line while the RAID array is rebuilt.Error Notification and RepairThe Image Server will notify users in the event of a fault by flashing the front panel DRIVESlight. A flashing DRIVES light can be trigged by a variety of conditions. The first step inresponse to a flashing light is to open the RAID CHECK STATUS window from the On-ScreenStart Menu. Click Start > System > RAID Status to launch the Array Configuration Utility.
