Using Your RAID Enclosure 29If a disk drive rebuild fails because of a source drive failure or because thedrive is too small, the user interface reports a failure of the physical disk eventhough the LED state on the drive indicates the rebuild was aborted (greenfor 3 seconds, amber for 3 seconds, then off for 3 seconds).Self-Monitoring Analysis and Reporting Technology (SMART)Self-Monitoring Analysis and Reporting Technology (SMART) monitors theinternal performance of all physical disk components to detect faultsindicating the potential for physical disk failure. SMART uses thisinformation to report whether failure is imminent so that a physical disk canbe replaced before failure occurs. The RAID controller monitors all attacheddrives and notifies users when a predicted failure is reported by a physicaldisk.Failed Assigned,Unassigned, HotSpare In Use, orHot Spare StandbyThe physical disk in the indicatedslot has been failed because of anunrecoverable error, an incorrectdrive type or drive size, or by itsoperational state being set tofailed.Amber flashing(125 ms)Replaced Assigned The physical disk in the indicatedslot has been replaced and is readyto be, or is actively being,configured into a disk group.Green flashing(On 400 ms, Off100 ms)PendingFailureAssigned,Unassigned, HotSpare In Use, orHot Spare StandbyA SMART error has been detectedon the physical disk in theindicated slot.Flashing Green,Amber, and off(none) (none) The indicated slot is empty, or thearray cannot detect the physicaldisk.OffTable 2-1. RAID Controller Physical Disk States (continued)Status Mode Description Physical DiskStatus LEDIndication