Compaq HSZ80 manual Glossary

	GL–1
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 contained on a removable ROM program card that provides the
software	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	A replacement routine that substitutes defect-free disk blocks for those
replacement	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.

Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide