User Guide126www.nec-computers.comAuto Rebuild FunctionalityIf your server includes a disk array controller, the auto rebuild function can be used torestore data from the defective hard disk drive. The auto rebuild function can write thedata saved from a defective hard disk to the replacement disk drive thereby recoveringthe server to the state before the occurrence of the fault.The auto rebuild function is valid for disk arrays set to RAID1 or RAID5.The auto rebuild is automatically started only by the hot-swap of a defective hard disk(or disk replacement in the power-on state). During the auto rebuild, the disk lamp onthe hard disk is lit green or amber alternatively.Warning■ If the auto rebuild fails, the disk lamp on the hard disk drivegoes on amber. Provide the disk removal or installationagain to run the auto rebuild.■ If the disk array monitoring utility is installed, the followingdisplay or operation may occur. However, the auto rebuild isconducted correctly if the disk lamp of the hard disk drivesubject to the auto rebuild is not lit amber after the termina-tion of the auto rebuild.- –Message "Rebuild was canceled" appears on thescreen during the auto rebuild.- –It seems that the auto rebuild is terminated once andthen restarted.Caution■ Do not turn off the power of the server in the intervalbetween a fault of a hard disk to the end of the auto rebuildprocess.■ Wait at least 90 seconds from the time you remove a defec-tive disk drive to the time you install the replacement diskdrive.■ If a hard disk is rebuilding, do not replace another disk. (Thedisk lamp on the hard disk being rebuilt is lit green or amberalternatively.)
