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2 X 2 SCSI MATRIX SWITCH
6.SCSI Technical Information
6.1SCSI Basics
6.1.1 SCSI-1
The original specification supports data transfers up to 5 MBps on an
6.1.2 SCSI-2
Improved compatibility and higher transfer rates were provided in this enhancement. The addition of “Wide SCSI” permits 16 or 32 bits to be transferred in parallel, the latter requiring two cables. In combination with the “Fast SCSI” option, synchronous data transfers up to 10 MBps for
6.1.3 SCSI-3
The most significant additions include the ability to address up to 32 devices, a
6.1.4SIGNAL WIRING
The signal wiring used in a SCSI bus has an impact on bus performance. The two wiring techniques generally used for SCSI are
Differential wiring uses two wires for each signal and offers exceptional noise resistance because it does not rely on a common ground. This allows cables up to 25 meters (82 ft.) and reliable operation at 10 MB or more per second. Differential wiring and circuitry is more complex than
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