LSI 20860 - Manual (Page 25)

Glossary of Terms and Abbreviations A-3
Port Number See Port Address.
RAM Random Access Memory. The computer’s primary working memory in
which program instructions and data are stored and are accessible to the
CPU. Information can be written to and read from RAM. The contents of
RAM are lost when the computer is turned off.
ROM Read Only Memory. Memory from which information can be read but not
changed. The contents of ROM are not erased when the computer is
turned off.
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 current SCSI specification which adds features to the original
SCSI-1 standard.
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.
STA SCSI Trade Association. A group of companies that cooperate to
promote SCSI parallel interface technology as a viable mainstream I/O
interconnect for commercial computing. Refer to their web site at
www.scsita.org for more detailed information.