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5
Engl
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RAID Setup
You may use your hard disks in combination with Striping
(RAID 0), Mirroring (RAID 1), Parity Across Disks
(RAID 5) for either fault tolerance or performance.
Prepare the following before setting up your serial ATA
hard disks in RAID mode:
• The Microsoft Windows OS disc.
• A second hard disk installed in the Primary HDD bay for
RAID level 0 or 1 or 5
.
OR
A
second hard disk installed in the Primary HDD bay, and
a third hard disk in the Secondary HDD bay for RAID
level 5 .
• The Device Drivers & Uti User’s Manual disc.
Table 2 - RAID Description

RAID Hard Disks
All hard disks in a RAID should be identical (the same
size and brand) in order to prevent unexpected system
behavior.
RAID Level Description
RAID 0
(at lease two
hard disks
needed)
Identical drives reading and writing data in paral-
lel to
increase performance . RAID 0 imple-
ments a striped disk array and the data is broken
into blocks and each block is written to a sepa-
rate disk drive.
RAID 0 (a striped array) is not fault-tolerant. The
failure of one drive will result in the loss of all
data in the array.
RAID 1
(at lease two
hard disks
needed)
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 con-
tains 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.
RAID 1 (mirrored array) provides full data protec-
tion, as data can simply be copied from a healthy
disk to a replacement for any failed disk.
RAID 5
(three hard
disks
needed)
Identical drives (at least three drives must be
used) in a parity across disks configuration are
used to
protect data and increase perfor-
mance . A RAID 5 array can withstand a single
disk failure without losing access to data.