1. Installing Internal Optional DevicesExpress5800/T110g-S User’s Guide58Chapter 2 PreparationsNotes on setting up a RAID System1.9.1Note the following points when setting up a RAID system. The number of hard disk drives required varies in each RAID level. If an on-board RAID controller or optional RAID controller (N8103-171/172) is used, the RAID systemcannot be built in RAID5/RAID6.RAID levelThe minimum number of hard disk drives required to set up a RAID systemOn-board RAID Controller orN8103-171/172 N8103-173/174/168RAID 0 1 1RAID 1 2 2RAID 5 3RAID 6 3RAID 10 4 4RAID 50 6RAID 60 6 Use SAS/SATA hard disk drives or SSDs that have the same capacity and rotational speed. RAID 10 using a hard disk drive of 2 TB or more cannot be supported if an on-board RAID controller isused. When installing an OS in your RAID system, you can easily complete the setup process, including RAIDconfiguration and OS installation, by using EXPRESSBUILDER. If you are installing the OS manually, use the RAID system configuration utility. The utility can be runduring POST which starts immediately after the server is turned on. For details, see Chapter 2 (4. RAIDSystem Configuration) in "Maintenance Guide" or the manual supplied with the optional RAID controller.Important Do not change the RAID system mode to hibernate. A mix of SAS and SATA drives cannot be used within the RAID system.
