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5-2 Chapter 5: RAID Conguration
5.1 RAID congurations
The server system/motherboard comes with the Intel
®
ICH7R and the LSI
Logic Embedded SATA RAID technology built-in the Intel
®
ICH7R SouthBridge
chipset that allows you to congure IDE and Serial ATA hard disk drives as
RAID sets. The motherboard supports the following RAID congurations:
5.1.1 RAID denitions
RAID 0
(Data striping)
optimizes two identical hard disk drives to read and
write data in parallel, interleaved stacks. Two hard disks perform the same
work as a single drive but at a sustained data transfer rate, double that of
a single disk alone, thus improving data access and storage. Use of two new
identical hard disk drives is required for this setup.
RAID 1
(Data mirroring)
copies and maintains an identical image of data from
one drive to a second drive. If one drive fails, the disk array management
software directs all applications to the surviving drive as it contains a com-
plete copy of the data in the other drive. This RAID conguration provides
data protection and increases fault tolerance to the entire system. Use two
new drives or use an existing drive and a new drive for this setup. The new
drive must be of the same size or larger than the existing drive.
Intel
®
Matrix Storage. The Intel
®
Matrix Storage technology supported by the
ICH7R chip allows you to create a RAID 0 and a RAID 1 set using only two
identical hard disk drives. The Intel
®
Matrix Storage technology creates two
partitions on each hard disk drive to create a virtual RAID 0 and RAID 1 sets.
This technology also allows you to change the hard disk drive partition size
without losing any data.
If you want to boot the system from a hard disk drive included in a cre-
ated RAID set, copy rst the RAID driver from the support CD to a oppy
disk before you install an operating system to the selected hard disk
drive. Refer to section “6.1 RAID driver installation” for details.