1. Installing Internal Optional DevicesExpress5800/R120d-2E User’s Guide 101Chapter 2 Preparations1.18.2 Notes on configurating a RAID SystemNote the following points when setting up a RAID System.• The number of Hard Disk Drives required varies in each RAID level.• If the optional RAID Controller (N8103-149) is used, the RAID System of RAID5/RAID6/RAID50/RAID60cannot be built.RAID levelThe minimum number of Hard Disk Drives required to set up a RAID SystemN8103-149 N8103-150/151RAID 0 1 1RAID 1 2 2RAID 5 3RAID 6 3RAID 10 4 4RAID 50 6RAID60 6• Use SAS/SATA Hard Disk Drives or SSDs that have the same capacity and rotational speed.• If you intend to install the OS to the RAID System, the process from RAID configuration to OS installationcan be easily completed by using the EXPRESSBUILDER. If you wish to install the OS manually, use aRAID System Configuration utility (WebBIOS or SuperBuild utility). The utility can be run during POSTwhich starts immediately after the server is turned on. For details on the procedure of configuring aLogical Drive, refer to Chapter 2 (4. RAID System Configuration) in "Maintenance Guide" or the manualsupplied with the optional RAID Controller (N8103-149/150/151).Important • Do not change the RAID System mode to hibernate.• Build a Disk Array in the RAID System using Hard Disk Drives that havethe same specifications (capacity, rotational speed, and standard).
