Modules
Setting Up SATA RAID or AHCI Mode 6 - 3
6
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 6 - 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.
SATA Mode Selection
The SATA mode selection should be made
before installing your operating system
.
DO NOT change your selected SATA mode
unless you intend to reinstall your operating
system. Make sure you have backed up all your data before doing so.
RAID Hard Disks/Solid State Drives
All hard disks/solid state drives in a RAID should be identical (the same size and brand) in
order to prevent unexpected system behavior.
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