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4-32 Configuring Your Server
RAID CONFIGURATION
This section describes how to use the internal hard disk drives in the disk array RAID configuration. To use an external
hard disk drive in a disk array, the optional disk array controller and the additional disk drive are necessary. Refer to the
manual of the optional disk array controller or additional external disk drive for details.
To configure the internal hard disk drives as the disk array drive:
Configure the two SATA hard disk drives by using the onboard RAID controller.
Configure the hard disk drives by using the optional disk array controller.
RAID Configuration of Serial ATA Hard Disk Drive
Your server includes the serial ATA RAID controller supporting the RAID levels 0 and 1.
You need two SATA (serial ATA) hard disk drives for configuration.
RAID0 (striping)
Stores data on two hard disk drives by dividing it (striping). Both hard disk drives can be accessed at the same
time. This improves disk access performance compared with using a single hard disk.
IMPORTANT:
RAID0 does not have data redundancy. When a hard disk drive failure occurs, data
cannot be restored.
Logical capacity of the array becomes a multiple of the connected hard disk drive.
RAID1 (mirroring)
Stores the data being saved to one hard disk dive to another hard disk drive. This method is called
"mirroring." When storing data onto one hard disk drive, the same data is simultaneously stored onto another
hard disk drive. When a hard disk drive becomes faulty, the one with the same data can be used. This provides
operation without the system going down.
IMPORTANT:
RAID1 reads or writes data to/from the two hard disk drives at the same time. The disk
access performance is lower than the single disk.
Logical capacity of the array is equal to one hard disk drive connected.
Installing the Hard Disk Drives
Install the two serial ATA hard disk drives to your server. Refer to Chapter 9 for detail.
IMPORTANT:
disk drives of the same capacity if you are going to configure RAID1.
Enabling RAID Feature by BIOS SETUP Utility
The two hard disk drives installed can be used either as a single disk or a RAID drive.
To configure a disk drives as RAID drive, you must specify the hard disk drive being connected to the onboard SATA
connector as a RAID drive by using the BIOS SETUP Utility.
NOTE:
The factory-set value is to use the hard disk drive as a single disk drive.
Use two hard disk drives of the same revolution. In addition, use two hard
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