Avago Technologies LSI20160 User Manual
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Glossary of Terms and Abbreviations
Copyright © 1993–2001 by LSI Logic Corporation. All rights reserved.
SCSI
Small Computer System Interface. A specification for a high-performance
peripheral bus and command set. The original standard is referred to as
SCSI-1.
SCSI-2
The SCSI specification which adds features to the original SCSI-1
standard.
SCSI-3
The current SCSI specification which adds features to the original SCSI-2
standard.
SCSI SPI-4
SCSI Parallel Interface. This specification defines 16-bit SCSI
asynchronous commands with synchronous data transfer rates up to
320 megabytes per second. Low Voltage Differential (LVD) SCSI is
required SCSI SPI-4 for Fast-160DT.
SCSI Bus
A host adapter and one or more SCSI peripherals connected by cables in a
linear chain configuration. The host adapter may exist anywhere on the
chain, allowing connection of both internal and external SCSI devices. A
system may have more than one SCSI bus by using multiple host adapters.
SCSI Device
Any device that conforms to the SCSI standard and is attached to the
SCSI bus by a SCSI cable. This includes SCSI host adapters and SCSI
peripherals.
SCSI ID
A way to uniquely identify each SCSI device on the SCSI bus. Each SCSI
bus has eight available SCSI IDs numbered 0 through 7 (or 0 through
15 for Wide SCSI). The host adapter usually gets ID 7 giving it priority to
control the bus.
SDMS
Storage Device Management System. An LSI Logic software product that
manages SCSI system I/O.
Single-Ended
SCSI
A hardware specification for connecting SCSI devices. It references each
SCSI signal to a common ground.
Software
The entire set of programs, procedures, and related documentation
associated with a computer system.
Source Code
Software instructions written as text in a high level programming
language. It is readable by humans who know the language.
Synchronous
Data Transfer
One of the ways data is transferred over the SCSI bus. Transfers are
clocked with fixed-frequency pulses. It is faster than asynchronous data
transfer, but cannot be used for certain kinds of transfers, so some
negotiation is required.