Avago Technologies LSI20160 User Manual
Page 259
3.75 pc
10.25 pc
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38.25 pc
4.333 pc
48.583 p
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44.25 pc
Glossary of Terms and Abbreviations
A-7
Copyright © 1993–2001 by LSI Logic Corporation. All rights reserved.
POST
Power-On Self-Test. A set of routines stored in ROM that provides
diagnostic tests for various system components before booting can
proceed.
PPR
Parallel Protocol Request. This method sends messages to negotiate
synchronous data transfer agreement, wide data transfer agreement, and
set the protocol options between two SCSI devices. Negotiations using
this message shall only be initiated by Initiators.
Processor
A computer hardware component that performs computations directed by
software commands.
Q
Queue Tags
A way to keep track of multiple commands that allows for increased
throughput on the SCSI bus.
R
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.
Removable
Media
A computer data storage device in which the magnetic disk or tape is
enclosed in a removable cassette or cartridge.
RISC Core
Most LSI Logic SCSI 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.
S
SCAM
SCSI Configured AutoMatically. A method to automatically allocate SCSI
IDs using software when SCAM compliant SCSI devices are attached.
Scatter/Gather
The efficient method of storing, where it stores information in various
sectors and tracks instead of trying to find enough sectors in a row to
store the data.