A-6
Glossary of Terms and Abbreviations
Ver. 2.0
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
CPU. Information can be written to and read from RAM. The contents of
RAM are lost when the computer is turned off.
Responder
A FC term referring to the answering device.
RISC Core
LSIFC909 chips contain a RISC (Reduced Instruction Set Computer)
processor, programmed through microcode scripts.
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.
SAN
Storage Area Network.
SCAM
SCSI Configured AutoMatically. A method to automatically allocate SCSI
IDs using software when SCAM compliant SCSI devices are attached.
Scatter/Gather
A device driver feature that lets the host adapter modify a transfer data
pointer so that a single host adapter transfer can access many segments
of memory. This minimizes interrupts and transfer overhead.
SCB
SCSI Command Block.
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-3
The current SCSI specification, which adds features to the original
SCSI-1 standard.
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.
Sequence
A term referring to one of the FC “building blocks”, composed of one or
more related frames for a single operation.
SGL
Scatter Gather List.
SNAP
SubNetwork Access Protocol.
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
