Datoptic ARC-1680 Series Instrukcja Użytkownika Pobierz pdf (Strona 182)

APPENDIX

182

Summary of RAID Levels

RAID subsystem supports RAID Level 0, 1, 10(1E), 3, 5, 6, 30, 50 and

60. The following table provides a summary of RAID levels.

Features and Performance

RAID

Level

Description Min. Disks

requirement

Data

Reliability

0 Also known as stripping

Data distributed across multiple drives

in the array. There is no data protec-

tion.

1 No data

Protection

1 Also known as mirroring

All data replicated on N Separated

disks.

N is almost always 2.

This is a high availability Solution, but

due to the 100% duplication, it is also

a costly solution.

2 Single-disk failure

10(1E) Also known Block-Interleaved Parity.

Data and parity information is sub-

divided and distributed across all

disks. Parity must be the equal to the

smallest disk capacity in the array.

Parity information normally stored on

a dedicated parity disk.

3 Single-disk failure

3 Also known Bit-Interleaved Parity.

Data and parity information is sub-

divided and distributed across all

disk. Parity must be the equal to the

smallest disk capacity in the array.

Parity information normally stored on

a dedicated parity disk.

3 single-disk failure

5 Also known Block-Interleaved Distrib-

uted Parity.

Data and parity information is sub-

divided and distributed across all

disk. Parity must be the equal to the

smallest disk capacity in the array.

Parity information normally stored on

a dedicated parity disk.

3 single-disk failure

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