DFI LanParty NFII Ultra B User Manual download pdf (Page 133)

RAID

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The NVIDIA nForce4 chip supports NVIDIA RAID (Redundant Ar-

ray of Independent Disk) that allows RAID arrays spanning across 4

Serial ATA and Parallel ATA drives. It supports RAID 0, RAID 1,

RAID 0+1 and JBOD.

RAID Levels

RAID 0 (Striped Disk Array without Fault Tolerance)

RAID 0 uses two new identical hard disk drives to read and write

data in parallel, interleaved stacks. Data is divided into stripes and

each stripe is written alternately between two disk drives. This

improves the I/O performance of the drives at different channel;

however it is not fault tolerant. A failed disk will result in data loss in

the disk array.

RAID 1 (Mirroring Disk Array with Fault Tolerance)

RAID 1 copies and maintains an identical image of the data from

one drive to the other drive. If a drive fails to function, the disk array

management software directs all applications to the other drive since

it contains a complete copy of the drive’s data. This enhances data

protection and increases fault tolerance to the entire system. Use

two new drives or an existing drive and a new drive but the size of

the new drive must be the same or larger than the existing drive.

RAID 0+1 (Striping and Mirroring)

RAID 0+1 is a combination of data striping and data mirroring

providing the benefits of both RAID 0 and RAID 1. Use four new

drives or an existing drive and three new drives for this

configuration.

JBOD (Spanning)

JBOD redundantly stores the same data on multiple disks that ap-

pear as a single disk on the operating system.

Chapter 6 - RAID

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DFI LanParty NFII Ultra B User Manual Page 133