HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide (EK-G80TS-SA. C01, March 2005)

275HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide
glossary
Glossary
Glossary
This glossary defines terms pertaining to HSG60 and HSG80 array controllers.
This glossary is not a comprehensive glossary of computer terms.
8B/10B
A type of byte encoding and decoding to reduce errors in data transmission patented by the
IBM Corporation. This process of encoding and decoding data for transmission was
adopted by ANSI.
ACS
Array Controller Software. The software component of the HS-series array controller
storage systems. ACS executes on the controller and processes input and output (I/O)
requests from the host, performing device-level operations required to satisfy the requests.
adapter
A device that converts the protocol and hardware interface of one bus type into that of
another without changing functionality of the bus.
AL_PA
Arbitrated loop physical address. A one-byte value used to identify a port in an Arbitrated
Loop topology. The AL_PA value corresponds to bits 7:0 of the 24-bit Native Address
Indentifier.
alias address
An AL_PA value recognized by an arbitrated loop port in addition to the assigned AL_PA.
ANSI
American National Standards Institute. An organization that develops standards used
voluntarily by many manufacturers within the USA. ANSI is not a government agency.
arbitrate
A process of selecting one L_Port from a collection of several ports that request use of the
arbitrated loop concurrently.
arbitrated loop
A loop type of topology where two or more ports can be interconnected, but only two ports
at a time can communicate.