RAID Level 1+0: striping, mirror spans two drives

RAID Level 1+0 increases data transfer rates while ensuring security by writing the exact same data simultaneously to two or more different drives.

RAID Level 1+0 is used in applications requiring high performance and redundancy, combining the attributes of RAID Levels 1 and 0.

The ATTO FastStream supports an even number of 4 to 16 drives per RAID Level 1+0 group.

 

Disk 1

Disk 2

Disk 3

Disk 4

Stripe 1

Data 1

Data 1

Data 2

Data 2

Stripe 2

Data 3

Data 3

Data 4

Data 4

Stripe 3

Data 5

Data 5

Data 6

Data 6

 

RAID Level 4: striping, one parity drive

RAID 4 writes data across multiple drives or devices (striping) with parity blocks written to a single drive in the RAID group. This increases reliability while using fewer drives than mirroring.

RAID Level 4 is best suited for applications that perform mostly sequential access such as video applications.

You must have at least three drives to set up RAID Level 4.

 

Disk 1

Disk 2

Disk 3

Disk 4

Stripe 1

Data 1

Data 2

Data 3

Parity 1-3

Stripe 2

Data 4

Data 5

Data 6

Parity 4-6

Stripe 3

Data 7

Data 8

Data 9

Parity 7-9

 

RAID Level 5: striping, parity distributed among drives

RAID Level 5 increases reliability while using fewer drives than mirroring by using parity redundancy: parity is distributed across multiple drives.

The ATTO FastStream supports 3 to 16 drives per RAID Level 5 group.

 

Disk 1

Disk 2

Disk 3

Disk 4

Stripe 1

Data 1

Data 2

Data 3

Parity 1-3

Stripe 2

Data 5

Data 6

Parity 4-6

Data 4

Stripe 3

Data 9

Parity 7-9

Data 7

Data 8

Stripe 4

Parity 10-12

Data 10

Data 11

Data 12

xxi

ATTO Technology Inc. FastStream SC Installation and Operation Manual

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ATTO Technology SC 5700 RAID Level 1+0 striping, mirror spans two drives, RAID Level 4 striping, one parity drive
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