Areca ARC-1231ML/1261ML/1280ML 사용자 설명서

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RAID 6 provides the highest reliability, but is not yet widely used. 

It is similar to RAID 5, but it performs two different parity com-

putations or the same computation 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 dis-

tributed 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 par-

ity is calculated and written across all of the drives.

The SATA RAID controller supports RAID Level 0, 1, 1E, 3, 5 and 6.  

The table below provides a summary of RAID levels. 

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