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[ The PC Guide | Systems and Components Reference Guide | Hard Disk Drives | Hard Disk Interfaces and Configuration | Small Computer Systems Interface (SCSI) | SCSI Data Transfer Modes and Feature Sets ]

Fast Wide SCSI

Description: Fast Wide SCSI combines the features of Wide SCSI and Fast SCSI, so it uses 10 MHz SCSI bus speed on a 16-bit wide bus. This doubles the maximum transfer rate to 20 MB/s, the fastest bus defined under the SCSI-2 standard. This protocol is sometimes called Fast Wide SCSI-2.

Defining Standard: SCSI-2.

Special Features: None.

Bus Width: Wide (16-bit).

Signaling Method: SE or HVD.

Signaling Speed and Bus Throughput: 10 MHz bus speed; 20 MB/s.

Number of Devices Supported: 16.

Termination: For SE, either active or forced perfect termination. For HVD, HVD termination.

Cabling and Maximum Cable Length: "P" cable (68 pins). (Formerly, "A" cable plus "B" cable.)Maximum of 6m for SE, 25m for HVD.

Next: Ultra SCSI


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