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Using Serial ATA RAID

This motherboard adopts AMD SB600 southbridge chipset that supports

Serial ATA (SATA) hard disk.For optimal performance,please install identical

drives of the same model and capacity when creating a RAID set.

1.Introduction

RAID Basics

RAID(Redundant Array of indenpendent Disks)is a method of combining

two hard disk drives into one logical unit .The advantage of an Array is to

provide better performance or data fault tolerance. Fault tolerance is

achieved through data redundant opration, where if one drives fails, a

mirrored copy of the data can be found on the other drive. This can prevent

data loss if the operating system fails or hangs.The individual disk drives

in an array are called members.The configuration information of eath

member is recorded in the reserved sector that identifies the drive as a

member.All disk members in a formed disk array are recognized as a

singal phsical drive to the oprating system.

Hard disk drives can be combined together through a few different

methods. The different methods are reffered to as different RAID levels.

Different RAID levels represent different performance levels,security

levels and implementation costs.The RAID levels which the AMD SB600

SATA RAID Host Controller supports are RAID 0,1,0+1 and JBOD.

RAID 0 (Striping)

RAID 0 reads and writes sectors of data interleaved between

multipledrives. If any disk member fails, it affects the entire array. The disk

array data capacity is equal to the number of drive members times the

capacity of the smallest member. The striping block size can be set from

4KB to 64 KB . RAID 0 does not support fault tolerance.

RAID 1(Mirroring)

RAID 1 writes duplicate data onto a pair of drives and reads both sets of

data in parallel. If one of the mirrored drives suffers a mechanical failure