1. Installing Internal Optional Devices
Express5800/T120h User’s Guide
141
Chapter 2 Preparations
1.23
Use of Internal Hard Disk Drives in the RAID System
This section describes how to use the internal hard disk drives in the RAID system.
Important If you use hard disk drives in the RAID system or change the RAID level, hard
disk drives are initialized. If the hard disk drive contains valuable data, be
sure to backup the hard disk drive before installing the RAID controller and
configuring the RAID system.
Note
Build a disk array in the RAID system using hard disk drives that have the same
specifications (capacity, rotational speed, and standard).
Tips
Logical drives can be created even with only one physical device.
When using SAS hard disk drive, SAS SSD, or SATA SSD, it must be
connected to RAID controller.
Notes on Building RAID System
Note the following points when building a RAID system.
The number of hard disk drives required varies in each RAID level.
If the optional RAID Controller N8103-189/195 is used, the RAID System cannot be built in
RAID5/RAID6/RAID50/RAID60.
RAID level
The minimum number of hard disk drives required to set up a
RAID System
N8103-189/195
N8103-190/191/196/201
RAID 0
1
1
RAID 1
2
2
RAID 5
3
RAID 6
3
RAID 10
4
4
RAID 50
6
RAID 60
6
In the RAID System, all the hard disk drives in a group (pack) must have the same capacity, interface type, 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 EXPRESSBUILDER.
To install the OS manually, use the RAID System Configuration Utility. For a detailed description of the utility,
refer to Chapter 2 (2. RAID System Configuration) in Maintenance Guide, or the manual attached to the optional
RAID controller (N8103-189/190/191/195/196/201).
Important Build a Disk Array in the RAID System using hard disk drives that have the
same specifications (capacity, rotational speed, and standard).
