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Summary: SCSI Types, Standards, Speeds, Cables and Connectors
Table 23
ties together much of what we have discussed in this chapter so far,
by summarizing the various SCSI types and standards, showing their maximum
speeds, cable length limits and the connectors they use.
Table 23: Summary Table of SCSI Standards, Speeds, Cable Lengths and Connectors
Bus Width
|
SCSI Standard
|
Maximum Speed
(MB/s)
|
Maximum Cable Length
|
Connectors Typically Used
|
8-bit
(Narrow SCSI)
|
SCSI-1
|
5
|
6 m / 19.6
|
Ribbon IDC 50,
Centronics 50, DB-25, DB-50
|
SCSI-2
Fast SCSI,
Fast-10
|
10
|
3 m / 9.8
|
Ribbon
IDC 50, Half-Pitch DB-50
|
Ultra SCSI,
Fast-20
|
20
|
1.5 m / 4.9
|
Ultra2 SCSI
|
40
|
12 m / 39
|
16-bit
(Wide SCSI)
|
SCSI-2,
Fast Wide SCSI, Fast-10 Wide
|
20
|
3 m / 9.8
|
Half-Pitch
DB-68
|
Ultra Wide SCSI,
Fast-20 Wide
|
40
|
1.5 m / 4.9
|
SCSI-3,
Ultra2 Wide (U2W) SCSI,
Ultra2 LVD SCSI,
Fast-40 Wide
|
80
|
12 m / 39
|
Half-Pitch
DB-68, Very High Density Centronics 68, SCA-80
|
Ultra3 SCSI,
Ultra160/m
|
160
|
12 m / 39
|
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CertiGuide to A+ (A+ 4 Real) (http://www.CertiGuide.com/apfr/) on CertiGuide.com
Version 1.0 - Version Date: March 29, 2005
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