Technical data

GL–1
Compaq HSG80 Array Controller ACS Version 8.3 Maintenance and Service Guide
Glossary
This glossary defines terms pertaining to the HSG80 Fibre Channel array
controller. It 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 has been adopted by ANSI.
adapter A device that converts the protocol and hardware interface of one bus type
into another without changing the function of the bus.
ACS See array controller software.
ANSI American National Standards Institute. An organization who develops
standards used voluntarily by many manufacturers within the USA. ANSI is
not a government agency.
array controller See controller.
array controller
software
Abbreviated ACS. Software contained on a removable ROM program card
that provides the operating system for the array controller.
asynchronous Pertaining to events that are scheduled as the result of a signal asking for the
event; pertaining to that which is without any specified time relation. See
also synchronous.
autospare A controller feature that automatically replaces a failed disk drive. To aid
the controller in automatically replacing failed disk drives, you can enable
the AUTOSPARE switch for the failedset causing physically replaced disk
drives to be automatically placed into the spareset. Also called
“autonewspare.”
bad block A data block that contains a physical defect.
bad block
replacement
Abbreviated BBR. A replacement routine that substitutes defect-free disk
blocks for those found to have defects. This process takes place in the
controller, transparent to the host.
backplane The electronic printed circuit board into which you plug subsystem
devices—for example, the SBB or power supply.