XMG PRO 17, User Manual

Page: 156 / 350

Modules
6 - 4 Setting Up SATA RAID, Optane™ or AHCI Mode
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.
Note the following:
• RAID mode with UEFI disabled (legacy mode) does not support PCIe SSDs.
• AHCI mode with the IRST driver installed does not support PCIe SSDs.
Solid State Drives
All solid state drives in a RAID should be identical (the same size and brand) in order to
prevent unexpected system behavior.