Embedded SATA Software RAID 1-1
Copyright © 2004 by LSI Logic Corporation. All rights reserved.
Chapter 1Overview
This manual describes the Embedded SATA Software RAID for ICH6R. This
chapter provides an overview of this product and contains the following
sections:
•Section 1.1, “RAID Benefits,” page 1-1
•Section 1.2, “Product Features,” page 1-2
The Embedded SATA Software RAID supports four Serial ATA ports, providing
a cost-effective way to achieve higher transfer rates and reliability. Embedded
SATA Software RAID supports
•RAID level 0 data striping for improved performance
•RAID level 1 data mirroring for improved data reliability
•RAID level 10 data striping and mirroring for high data transfer rates and
data redundancy

1.1 RAID Benefits

RAID has gained popularity because it can improve I/O performance or
increases storage subsystem reliability. RAID 0 provides better performance,
while RAID 1 provides better reliability through fault tolerance and redundant
data storage. RAID 10 combines both striping and mirroring to provide high
data transfer rates and data redundancy.

1.1.1 Improved I/O

Although hard drive capabilities have improved drastically, actual performance
has improved only three to four times in the last decade. Computing
performance has improved over 50 times during the same time period. RAID 0
and RAID 10 allow you to access several disks simultaneously.