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5-2 Chapter 5: RAID conguration
5.1 RAIDcongurations
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
®
88SE6145 RAID. Enabled by Marvell
®
88SE6145 controller, the
Marvell
®
RAID extends the advantages of software RAID beyond internal hard
disk drives to external hard disk drives or port-multiplier devices.
5.1.1 RAIDdenitions
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.
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 CD to a oppy disk before you
install an operating system to the selected hard disk drive. Refer to section
6.1.1 Creating a RAID driver disk for details.