9-16 Upgrading Your Server6. To use the server with the hard disk drive removed, insert a dummy tray into the emptyslot.IMPORTANT: To maintain the cooling effect in the server, install thedummy tray in the vacant slot of the disk bay.7. Close the door opened in step 2 securely.In the disk array configuration, the auto rebuild function can be used. The auto rebuild function canrecord the information saved in a defected hard disk drive into the new replaced disk to recover theserver 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 defected hard disk drive (or diskreplacement in the power-on state). During the auto rebuild, the disk lamp on the hard disk drive islit green or amber alternatively.IMPORTANT: If the auto rebuild fails, the disk lamp on the hard disk drive goes onamber. Provide the disk removal or installation again to run the autorebuild. If the disk array monitoring utility is installed, the following displayor operation may occur. However, the auto rebuild is conductedcorrectly if the disk lamp of the hard disk drive subject to the autorebuild is not lit amber after the termination of the auto rebuild.– Message "Rebuild was canceled" appears on the screen duringthe auto rebuild.– It seems that the auto rebuild is terminated once and thenrestarted.Obey the following cautions when the auto rebuild function is used. Do not turn off the power of the server in the interval from a fault of a hard disk drive tothe end of the auto rebuild. Install a new hard disk drive after the interval of 90 seconds or longer has passed from theremoval of the defected hard disk drive. If a hard disk drive is being rebuilt, do not replace another disk. (The disk lamp on thehard disk being rebuilt is lit green or amber alternatively.)
