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4. Appendix
SCSI-2 - The current SCSI specification which adds features the original SCSI-
1 standard.
SCSI-3 - The next SCSI specification, which adds features to the SCSI-2 stan-
dard. Although this version is still in development, parts of the SCSI-3 stan-
dard are already in use.
SCSI Bus - A integrated SCSI and one or more SCSI peripherals connected by
cables in a linear chain configuration. The integrated SCSI may exist any-
where 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 integrated SCSI usually gets ID 7 giving it priority to
control the bus.
SDMS - SCSI Device Management System. An ASUS software product that
manages SCSI system I/O.
STA - SCSI Trade Association. A group of companies that cooperate to pro-
mote SCSI parallel interface technology as a viable mainstream I/O intercon-
nect for commercial computing.
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 integrated SCSI and each SCSI device.
System BIOS - Controls the low level POST (Power On Self Test), and basic
operation of the CPU and computer system.
Termination - The electrical connection required at each end of the SCSI bus,
composed of a set of resisters. It improves the integrity of bus signals.
ASUS LSI SCSI User's Manual
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