Modules & Options
Setting Up SATA RAID or AHCI Modes 7 - 61
7
Prepare the following before setting up your serial ATA hard disks in
RAID
mode
(to configure
AHCI
mode you do not need to prepare any extra hard disks but will
need to install the Intel Matrix driver):
1.
The
Microsoft Windows OS CD
.
2.
A
second
(identical) hard disk installed in the secondary HDD bay for
RAID level
0 or 1
(required for RAID but not required for AHCI).
3.
The
Device Drivers & Uti User’s Manual
disc.
RAID Level
Description
RAID 0
Identical drives reading and writing data in parallel to
increase performance
. RAID 0
implements a striped disk array and the data is broken into blocks and each block is
written to a separate disk drive.
RAID 1
Identical drives in a mirrored configuration used to
protect data
. Should a drive that is
part of a mirrored array fail, the mirrored drive (which contains identical data) will
handle all the data. When a new replacement drive is installed, data to the new drive is
rebuilt from the mirrored drive to restore fault tolerance.
Table 7 - 1
RAID Levels
Array Types
A
Mirrored Array
(
RAID 1
) provides full
data protection, as
data can simply be
copied from a healthy
disk to a replacement
for any failed disk.
A
Striped Array
(
RAID 0
) is
NOT
fault-
tolerant. The failure of
one drive will result in
the loss of all data in
the array. It is de-
signed to increase disk
performance by
spreading the I/O load
across the channels
and drives.
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