
1. Installing Internal Optional Devices
Express5800/T120e User’s Guide
128
Chapter 2 Preparations
1.18.2 Notes on setting up a RAID System
Note 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 (N8103-172) is used, the RAID System cannot be built in
RAID5/RAID6/RAID50.
The minimum number of hard disk drives required to set up a RAID
System
RAID level
N8103-172
N8103-173/174/168
RAID 0
1
1
RAID 1
2
2
RAID 5
3
RAID 6
3
RAID 10
4
4
RAID 50
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 installation
can be easily completed by using the EXPRESSBUILDER. If you wish to install the OS manually, use a
RAID System Configuration utility (WebBIOS). The utility can be run during POST which starts
immediately after the server is turned on. For details on the procedure of configuring a Logical Drive, refer
to
Chapter 2 (4. RAID System Configuration)
in "
Maintenance Guide
" or the manual supplied with the
optional RAID Controller (N8103-172/173/174/168).
Important
Do not change the RAID System mode to hibernate.
Build a Disk Array in the RAID System using hard disk drives that have the
same specifications (capacity, rotational speed, and standard).