Exhibit a-2 – ATTO Technology FastStream SC 5700 User Manual
Page 71
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Exhibit A-2 Various types of SCSI operate at different speeds and require different bus lengths to support
a certain number of devices.
STA terms
Bus speed
MB/sec.
max.
Bus
width
bits
Max. bus lengths in meters
Max. device
support
Single-
ended
Differential LVD
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
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