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5-28 Chapter 5: Software support
If you want to boot the system from a hard disk drive included in a created RAID
set, copy rst the RAID driver from the support DVD to a oppy disk before you
install an operating system to the selected hard disk drive. Refer to section “5.5
Creating a RAID driver disk” for details.
5.4 RAID congurations
The motherboard comes with two RAID controllers that allow you to congure Serial
ATA hard disk drives as RAID sets.
• The
Intel
®
ICH9R Southbridge RAID includes a high performance SATA
RAID controller that supports RAID 0, RAID 1, RAID 10, and RAID 5 for six
independent Serial ATA channels.
•
Marvell
®
88SE6121 RAID.
Enabled by Marvell
®
88SE6121 controller,
Marvell
®
RAID extends the advantages of software RAID beyond internal hard
disk drives to an external disk or external, port-multiplier enabled enclosure
5.4.1 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 complete 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.
RAID 5 stripes both data and parity information across three or more hard disk drives.
Among the advantages of RAID 5 conguration include better HDD performance,
fault tolerance, and higher storage capacity. The RAID 5 conguration is best suited
for transaction processing, relational database applications, enterprise resource
planning, and other business systems. Use a minimum of three identical hard disk
drives for this setup.
RAID 10 is data striping and data mirroring combined without parity (redundancy data)
having to be calculated and written. With the RAID 10* conguration you get all the
benets of both RAID 0 and RAID 1 congurations. Use four new hard disk drives or
use an existing drive and three new drives for this setup.
Intel
®
Matrix Storage. The Intel
®
Matrix Storage technology supported by the ICH9R
chip allows you to create a RAID 0, RAID 1, RAID 5, and RAID 10* function to improve
both system performance and data safety. You can also combine two RAID sets to
get higher performance, capacity, or fault tolerance provided by the difference RAID
function. For example, RAID 0 and RAID 1 set can be created by using only two
identical hard disk drives.