Dulce Systems

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RAID Level Descriptions

The Dulce RAID systems support a large variety of RAID Levels, we do however recommend RAID 5, it is the default shipping configuration unless otherwise directed.

RAID
Level

Description

Advantage

Disadvantage

Ideal for

0

Striping.

Highest performance.

No disk redundancy, one drive failure will lose all data.

Highest resolution HD, 2K, and maximum multiple streams.

1

Mirroring.

Highest redundancy.

Less cost efficient for redundancy, loses 1/2 disk capacity.

Data protection is paramount, maximum disk failure protection.

3

Striping with a dedicated parity drive.

Efficient drive redundancy, 1 drive used for parity.

Loses 1 disk drive capacity.

Well balanced for video requiring performance and redundancy.

5

Striping the parity across all drives.

Efficient drive redundancy, parity distributed to all drives.

Loses 1 disk drive capacity.

Well balanced for file server requiring performance and redundancy.

6

Striping with two
dedicated parity drives.

Double drive redundancy, 2 drives used for parity.

Loses 2 disk drive capacity.

Mission critical.

JBOD

Just a Bunch of disks.

Each drive can be accessed individually from operating system.

No redundancy.

Audio applications.

RAID + Spare

A drive is set aside as an online hot spare.

Automatic rebuild of a failed drive.

Loses another drive capacity. (In addition to the drive(s) needed for the RAID level selected.)

Minimizes degraded RAID level exposure time.

 
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