ATTO Technology SC 5700 Benutzerhandbuch

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RAID Level 0 (striping) is based on the fact that 
increased performance can be achieved by 
simultaneously accessing data across multiple drives, 
increasing data transfer rates while reducing average 
access time by overlapping drive seeks. Drives are 
accessed alternately, as if stacked one on top of the 

other. RAID Level 0 provides no data protection. If one 
drive fails, all data within that stripe set is lost.
RAID Level 0 is used by applications requiring high 
performance for non-critical data. 
The ATTO FastStream supports 2 to 16 drives per 
RAID Level 0 group. 

RAID Level 1 ensures the security of data by writing 
the exact same data simultaneously to two different 
drives. With RAID Level 1, the host sees what it 
believes to be a single physical drive of a specific size: 
it does not know about the mirrored pair. 

This application is used for critical data which cannot 
be at risk to be lost or corrupted due to the failure of a 
single drive. 
The ATTO FastStream supports an even number of 2 
to16 drives per RAID Level 1 group. 

RAID Level 1 with multiple mirrors uses at least 3 
drives with the same data on each drive. This 
application offers the highest fault-tolerance with good 

performance, especially for small database 
applications.

Stripe 2

Stripe 3

Data 12

Data 8

Data 4

Data 11

Data 7

Data 3

Data 10

Data 6

Data 2

Data 9

Data 5

Data 1

Stripe 1

Disk 1

Disk 2

Disk 3

Disk 4

Data 3

Data 2

Data 1

Data 3

Data 2

Data 1

Disk 1

Disk 2

Data 3

Data 2

Data 1

Data 3

Data 2

Data 1

Data 3

Data 2

Data 1

Disk 1

Disk 2

Disk 3