9-50 Upgrading Your ServerRAID CONTROLLER BOARDUsing the RAID controller allows you to use hard disk drives in the device bays of the server andthose in the optional expansion disk cabinet in the disk array configuration.IMPORTANT: The disk array controller board is extremely sensitive to staticelectricity. Make sure to touch the metal frame of the Server todischarge static electricity from your body before handling the diskarray controller board. Do not touch the disk array controller boardterminals or on-board parts by a bare hand or place the disk arraycontroller board directly on the desk. For static notes, see the section"Anti-static Measures" described earlier. Making hard disk drives in the disk array configuration or changingthe RAID level initializes hard disk drives. If the hard disk drive tobe configured in the array has your valuable data stored, make sureto make a backup copy of the data in another hard disk drive beforeinstalling the disk array controller board and configuring the array. The disk array configuration requires at least two hard disk drives. Use hard disk drives of the same capacity and performance (e.g.,revolution) for each pack to configure them in the array.NOTES: Before installing a disk array controller board, start the SETUPutility, select [Advanced] → [PCI Configuration], and confirm that[Enabled] is set for the parameter [PCI Slot xx ROM] (xx: PCI slotnumber). Your mother board includes the RAID controller. The onboardRAID controller supports the RAID0 and RAID1. A disk array configuration of RAID1 or RAID5 increases diskreliability. However, the actually available capacity becomes smallerthan the total hard disk drive capacity in the disk arrayconfiguration.InstallationSee "PCI Board" in this chapter and manual that comes with the optional RAID controller for theinstallation of a disk array controller.