ATTO Technology SC 5700 operation manual RAID Level 1+0 striping, mirror spans two drives

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

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ATTO Technology Inc. FastStream SC Installation and Operation Manual