1. Installing Internal Optional DevicesExpress5800/R120g-2E User's Guide128Chapter 2 Preparations1.20.2 Notes on Building RAID SystemNote the following points when building a RAID system.• The number of hard disk drives required varies in each RAID level.• If on-board RAID controllers or the optional RAID controller N8103-176 is used, the RAID system cannot bebuilt in RAID5/RAID6/RAID50/RAID60.RAID levelThe minimum number of hard disk drivesOn-board RAID Controller orN8103-176 N8103-177/178RAID 0 1 1RAID 1 2 2RAID 5 3RAID 6 3RAID 10 4 4RAID 50 6RAID 60 6• In the RAID system, all the hard disk drives in an array group must have the same capacity, interface type,and rotational speed.• EXPRESSBUILDER helps you to install the OS to a RAID array easily.• If you want to install the OS manually, use RAID Configuration Utility at POST (Ctrl-R or HII). For details, seeChapter 2 (5. RAID System Configuration) in "Maintenance Guide" or the manual provided with the optionalRAID controller (N8103-176/177/178).Important • Do not change the mode to hibernate while building a RAID system.• Build a disk array in the RAID system using hard disk drives that have thesame specifications (capacity, rotational speed, and standard).
