Raid Levels - DFI LanParty DK P35 Series User Manual

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Chapter 3 - RAID
The Intel ICH9R chip alows configuring RAID on Serial ATA drives.
It supports RAID 0, RAID 1, RAID 0+1 and RAID 5.

RAID Levels

RAID 0 (Striped Disk Array without Fault Tolerance)
RAID 0 uses two new identical hard disk drives to read and write
data in parallel, interleaved stacks. Data is divided into stripes and
each stripe is written alternately between two disk drives. This im-
proves the I/O performance of the drives at different channel;
however it is not fault tolerant. A failed disk will result in data loss
in the disk array.
RAID 1 (Mirroring Disk Array with Fault Tolerance)
RAID 1 copies and maintains an identical image of the data from
one drive to the other drive. If a drive fails to function, the disk
array management software directs all applications to the other
drive since it contains a complete copy of the drive's data. This
enhances data protection and increases fault tolerance to the
entire system. Use two new drives or an existing drive and a new
drive but the size of the new drive must be the same or larger
than the existing drive.
RAID 0+1 (Striping and Mirroring)
RAID 0+1 is a combination of data striping and data mirroring pro-
viding the benefits of both RAID 0 and RAID 1. Use four new drives
or an existing drive and three new drives for this configuration.
RAID 5
RAID 5 stripes data and parity information across hard drives. It is
fault tolerant and provides better hard drive performance and
more storage capacity.
Settings
To enable the RAID function, the following settings are required.
1. Connect the Serial ATA drives.
2. Configure Serial ATA in the Award BIOS.
3. Configure RAID in the RAID BIOS.
4. Install the RAID driver during OS installation.
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5. Install the Intel Matrix Storage Manager