Technical data

GL–1
Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide
Glossary
This glossary defines terms pertaining to the HSZ80. It is not a
comprehensive glossary of computer terms.
adapter A device that converts the protocol and hardware interface of one bus type
into another without changing the function of the bus.
ACS Array Controller Software. See array controller software.
array controller See controller.
array controller
software
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.
bad block A data block that contains a physical defect.
bad block
replacement
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.
battery hysteresis The ability of the software to allow write-back caching during the time when
a battery is charging, but only when a previous down time has not drained
more than 50 percent of a battery’s rated capacity.
BBR See bad block replacement.
BIST See built-in self-test.