Foxconn X38A User Manual

Page 73

Chapter 5 RAID Configuration

Introduction

RAID (Redundant Array of Independent 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. The motherboard comes with the Intel ICH9R.
The following RAID configurations are provided for users.

RAID 0 (Striping)
RAID 0 reads and writes sectors of data interleaved between multiple drives. 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 128KB. 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 or does not
respond, the remaining drive will continue to function. Due to redundancy, the
drive capacity of the array is the capacity of the smallest drive. Under a RAID 1
setup, an extra drive called the “spare drive” can be attached. Such a drive will be
activated to replace a failed drive that is part of a mirrored array. Due to the fault
tolerance, if any RAID 1

drive fails, data access will not be affected as long as

there are other working drives in the array.

RAID 5
RAID 5 Provides data striping at the byte level and also stripe error correction
information. This results in excellent performance and good fault tolerance. Level
5 is one of the most popular implementations of RAID.

RAID 10 (0+1)
RAID 10 is a combination of striping and mirroring. This configuration provides
optimal speed and reliability, but you need four SATA hard disks.

Intel

Matrix Storage

The Intel

Matrix Storage technology supports RAID 0 ,RAID 1, RAID 5, and RAID

10 (0+1) functions. It allows you to combine two RAID functions to get high perfor-
mance with fault tolerance, big capacity or data safety provided by different RAID
function.

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