LSI Ultra160 SCSI, VHDCI, Ultra SCSI, Ultra2 SCSI, Single-Ended, Ultra160 SCSI, Synchronous Data Transfer

Single-Ended

SCSI

A hardware specification for connecting SCSI devices. It references each SCSI signal to a common ground. This is the most common method (as opposed to differential SCSI which uses a separate ground for each signal).

Synchronous Data Transfer

One of the ways data is transferred over the SCSI bus. Transfers are clocked with fixed frequency pulses. This is faster than asynchronous data transfer. Synchronous data transfers are negotiated between the SCSI host adapter and each SCSI device.

Ultra SCSI	A standard for SCSI data transfers. It allows a transfer rate of up to
	20 Mbytes/s over an 8-bit SCSI bus and up to 40 Mbytes/s over a 16-bit
	SCSI bus.
Ultra2 SCSI	A standard for SCSI data transfers. It allows a transfer rate of up to
	40 Mbytes/s over an 8-bit SCSI bus, and up to 80 Mbytes/s over a
	16-bit SCSI bus.
Ultra160 SCSI	A standard for SCSI data transfers. It allows a transfer rate of up to
	160 Mbytes/s over a 16-bit SCSI bus.
VHDCI	Very High Density Cable Interconnect.

A-4 Glossary of Terms and Abbreviations