HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Maintenance and Service Guide (EK-G80MS-SA. C01, March 2005)

263HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service Guide
glossary
Glossary
Glossary
This glossary defines terms used in this guide or related to this product and is not
a comprehensive glossary of computer terms.
ACS
Array Controller Software. The software component of the array controller storage systems.
ACS executes on the array controller and processes input and 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
An array controller feature that automatically replaces a failed disk drive. Autospare aids the
array 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, an
array 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 downtime 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.