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4 raid configurations, 1 raid definitions, Raid configurations -40 5.4.1 – Asus MOTHERBOARD P5N64 WS User Manual

Page 148: Raid definitions -40

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5-40

Chapter 5: Software support

5.4

RAID configurations

The motherboard comes with three RAID controllers that allow you to configure

SATA / SAS hard disk drives as RAID sets.
• The NVIDIA

®

nForce

®

790i Ultra SLI™ SATA RAID includes a high

performance SATA RAID controller that supports RAID 0, 1, 10, and 5 for six

independent Serial ATA channels.

Marvell

®

88SE6121 eSATA RAID. Enabled by Marvell

®

88SE6121 controller,

the Marvell

®

RAID supports RAID 0, 1, 10 and 5 sets and extends the

advantages of software RAID beyond internal hard disk drives to external hard

disk drives or port-multiplier devices.

Marvell

®

88SE6320 SAS RAID. Enabled by Marvell

®

88SE6320 controller, the

Marvell

®

SAS RAID supports RAID 0 and 1 for two independent SAS channels.

5.4.1

RAID definitions

RAID 0

(Data striping) optimizes two identical hard disk drives to read and write

data in parallel, interleaved stacks. Two hard disks perform the same work as a

single drive but at a sustained data transfer rate, double that of a single disk alone,

thus improving data access and storage. Use of two new identical hard disk drives

is required for this setup.
RAID 1

(Data mirroring) copies and maintains an identical image of data from

one drive to a second drive. If one drive fails, the disk array management software

directs all applications to the surviving drive as it contains a complete copy of

the data in the other drive. This RAID configuration provides data protection and

increases fault tolerance to the entire system. Use two new drives or use an

existing drive and a new drive for this setup. The new drive must be of the same

size or larger than the existing drive.
RAID 5 stripes both data and parity information across three or more hard

disk drives. Among the advantages of RAID 5 configuration include better

HDD performance, fault tolerance, and higher storage capacity. The RAID

5 configuration is best suited for transaction processing, relational database

applications, enterprise resource planning, and other business systems. Use a

minimum of three identical hard disk drives for this setup.
RAID 10 is data striping and data mirroring combined without parity (redundancy

data) having to be calculated and written. With the RAID 10* configuration you get

all the benefits of both RAID 0 and RAID 1 configurations. Use four new hard disk

drives or use an existing drive and three new drives for this setup.

If you want to boot the system from a hard disk drive included in a created RAID

set, copy first the RAID driver from the support DVD to a floppy disk before you

install an operating system to the selected hard disk drive. Refer to section

5.5

Creating a RAID driver disk for details.

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