ATTO Technology FastStream VT, 5300 operation manual Iv Appendix

Models: 5300 FastStream VT

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users with critical data which cannot be lost or corrupted due to the failure of a single drive.

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.

The ATTO FastStream VT 5300 manages where data is written and read, allowing one drive to fail without the host knowing it has failed. RAID Level 1 is used in applications containing mission critical data. The ATTO FastStream VT 5300 supports an even number of 2 to 32 drives per RAID Level 1 group.

Exhibit A-4 RAID Level 1: Data is written to two or more drives simultaneously.

RAID Level 1

Stripe

Disk 0

Disk 1

Disk 2

Disk 3

Disk 4

Disk 5

 

 

 

 

 

 

 

0

D0

D0

D4

D4

D8

D8

1

D1

D1

D5

D5

D9

D9

2

D2

D2

D6

D6

D10

D10

3

D3

D3

D7

D7

D11

D11

 

 

 

 

 

 

 

RAID Level 10

RAID Level 10 increases data transfer rates while ensuring security by writing the exact same data simultaneously to two or more different drives.

RAID Level 10 is used in applications requiring high performance and redundancy, combining the attributes of RAID Levels 1 and 0.

The ATTO FastStream VT 5300 supports an even number of 4 to 32 drives per RAID Level 10 group.

Exhibit A-5 RAID Level 10 with mirroring and spanning; redundancy is shown in shaded blocks.

RAID Level 10

Stripe

Disk 0

Disk 1

Disk 2

Disk 3

Disk 4

Disk 5

 

 

 

 

 

 

 

0

D0

D0

D1

D1

D2

D2

1

D3

D3

D4

D4

D5

D5

2

D6

D6

D7

D7

D8

D8

3

D9

D9

D10

D10

D11

D11

 

 

 

 

 

 

 

RAID Level 5

RAID Level 5 increases reliability while using fewer drives than mirroring by employing parity redundancy. Distributed parity on multiple drives allows you to rebuild a failed drive from the remaining good drives. The ATTO FastStream VT 5300 operates in degraded mode if a drive fails.

The ATTO FastStream VT 5300 supports 3 to 32 drives per RAID Level 5 group.

Exhibit A-6 RAID Level 5 with parity blocks shaded.

RAID Level 5

Stripe

Disk 0

Disk 1

Disk 2

Disk 3

Disk 4

Disk 5

 

 

 

 

 

 

 

0

D0

D1

D2

D3

D4

P0-4

1

D6

D7

D8

D9

P5-9

D5

2

D12

D13

D14

P10-14

D10

D11

3

D18

D19

P15-19

D15

D16

D17

4

D24

P20-24

D20

D21

D22

D23

5

P25-29

D25

D26

D27

D28

D29

 

 

 

 

 

 

 

iv Appendix

Page 33
Image 33
ATTO Technology FastStream VT, 5300 operation manual Iv Appendix