Areca ARC-1280ML Uživatelský manuál stáhnout pdf (Strana 177)

177

APPENDIX

Summary of RAID Levels

The SATA RAID controller supports RAID Level 0, 1, 10(1E), 3, 5 and

6. The table below provides a summary of RAID levels.

Features and Performance

RAID

Level

Description Min.

Drives

Data

Reli-

ability

Data

Transfer

Rate

I/O Request

Rates

0 Also known as stripping

Data distributed across multiple

drives in the array. There is no

data protection.

1 No data

Protec-

tion

Very

High

Very High

for

Both Reads

and Writes

• RAID 6

RAID 6 provides the highest reliability. It is similar to RAID 5, but

it performs two different parity computations or the same compu-

tation on overlapping subsets of the data. RAID 6 can offer fault

tolerance greater than RAID 1 or RAID 5 but only consumes the

capacity of 2 disk drives for distributed parity data. RAID 6 is an

extension of RAID 5 but uses a second, independent distributed

parity scheme. Data is striped on a block level across a set of

drives, and then a second set of parity is calculated and written

across all of the drives.

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Areca ARC-1280ML Uživatelský manuál Strana 177