Exhibit A-2 Various types of SCSI operate at different speeds and require different bus lengths to support a certain number of devices.

 

Bus speed

Bus

Max. bus lengths in meters

Max. device

 

 

 

 

 

MB/sec.

width

 

 

 

STA terms

Single-

Differential

LVD

support

max.

bits

 

ended

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fast SCSI

10

8

3

25

NA

8

 

 

 

 

 

 

 

Fast/WIDE SCSI

20

16

3

25

NA

16

 

 

 

 

 

 

 

UltraSCSI

20

8

1.5

25

NA

8

 

 

 

 

 

 

 

Ultra/WIDE SCSI

40

16

NA

25

NA

16

 

 

 

 

 

 

 

Ultra/WIDE SCSI

40

16

1.5

NA

NA

8

 

 

 

 

 

 

 

Ultra/WIDE SCSI

40

16

3

NA

NA

4

 

 

 

 

 

 

 

Ultra2 SCSI

80

16

NA

NA

12

8

 

 

 

 

 

 

 

Ultra2/WIDE SCSI

80

16

NA

NA

12

16

 

 

 

 

 

 

 

Ultra160/WIDE SCSI

160

16

NA

NA

12

16

 

 

 

 

 

 

 

Ultra320 SCSI

320

16

NA

NA

12

16

 

 

 

 

 

 

 

xxiv

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ATTO Technology SC 5700 operation manual Support, Max Bits Ended