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HSG80 Array Controller V8.7 Maintenance and Service Guide
Glossary–1
Glossary
This glossary defines terms pertaining to the this controller maintenance and service guide.
This glossary is not a comprehensive glossary of computer terms.
ACS
Array Controller Software. The software component of the HS-series array controller storage
systems. ACS executes on the controller and processes input/output requests from the host,
performing the 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.
array controller
See controller
array controller software
See ACS
autospare
A controller feature that automatically replaces a failed disk drive. Autospare aids 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.
backplane
The electronic printed circuit board into which you plug subsystem devices—for example, a
controller or power supply.
battery hysteresis
The ability of the software to allow write-back caching during the time a battery is charging,
but only when a previous down time has not drained more than 50 percent of rated battery
capacity.
bit
A single binary digit having a value of either 0 or 1. A bit is the smallest unit of data a
computer can process.