Saturday, August 27, 2011

SCSI Evolution


SCSI Evolution
Common Name(s)
Maximum Speed (MB/second)
Signaling
Maximum Devices
Cable Lengths
SCSI-1
5
single-ended
7
up to 6m
SCSI-2
Fast SCSI
10
single-ended,
high-voltage differential
7
15
up to 6m single-ended
up to 25m differential
SCSI-3
Fast & Wide SCSI
20
single-ended,
high-voltage differential
7
15
up to 6m single-ended
up to 25m differential
Ultra SCSI
40
single-ended,
high-voltage differential
7
15
up to 6m single-ended
up to 25m differential
Ultra2 SCSI
80
low-voltage differential
15
up to 25m point-to-point
up to 12m for multiple devices
Ultra3 SCSI or
Ultra160 SCSI
160
low-voltage differential
15
up to 25m point-to-point
up to 12m for multiple devices
Ultra320 SCSI
320
low-voltage differential
15
up to 25m point-to-point
up to 12m for multiple devices

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