Fast Wide SCSI – Terms & Terminology

Fast Wide SCSI

Data transfers up to 20 megabytes per second, first defined in SCSI-2 below, defines how it is used in the different generations of the SCSI standards.

SCSI-2

16 bit SCSI asynchronous commands with Synchronous data transfer rates up to 20 megabytes per second. Bipolar technology with Open collector or active negation single ended bus transceivers, passive or active termination. and Differential (Now called HVD – High Voltage differential) bus transceivers based on EIA 485 allowed in SCSI-2.

SCSI SPI (SCSI Parallel Interface)

16 bit SCSI asynchronous commands with Synchronous data transfer rates up to 20 megabytes per second. CMOS technology with Open Drain or active negation single ended bus transceivers, passive or active termination, and Differential (Now called HVD – High Voltage differential) bus transceivers based on EIA 485 allowed in SCSI SPI.

SCSI SPI-2 (SCSI Parallel Interface)

16 bit SCSI asynchronous commands with Synchronous data transfer rates up to 20 megabytes per second. CMOS technology with Open Drain or active negation single ended bus transceivers, active termination, LVD (Low Voltage Differential) and Differential (HVD – High Voltage differential) bus transceivers based on EIA 485 allowed in SCSI SPI-2.