Upgrading Your Server 9-67USE OF INTERNAL HARD DISK DRIVES IN THE RAIDSYSTEMUsing 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 RAID System.A RAID system can be built by using an optional RAID controller (N8103-129/130).IMPORTANT: Making hard disk drives in the RAID System or changing the RAIDlevel initializes hard disk drives. If the hard disk drive to beconfigured in the RAID System has your valuable data stored, makesure to make a backup copy of the data in another hard disk drivebefore installing the RAID controller and configuring the RAIDSystem. More than one hard disk drive is required to configure a LogicalDrive. Use hard disk drives of the same capacity and performance (e.g.,revolution) for each pack to configure them in the RAID System.NOTES: Make sure of RAID levels and hard disk drives available for theRAID controller to choose an appropriate controller. A Logical Drive except for RAID0 increases disk reliability.However, the actually available capacity becomes smaller than thetotal hard disk drive capacity in the Logical Drive.