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backup cache
A second, very fast cache memory that is closely coupled with the processor.
bandwidth
The rate of data transfer in a bus or I/O channel. The rate is expressed as the
amount of data that can be transferred in a given time, for example megabytes
per second.
battery backup unit
A battery unit that provides power to the entire system enclosure (or to
an expander enclosure) in the event of a power failure. Another term for
uninterruptible power supply (UPS).
boot
Short for bootstrap. To load an operating system into memory.
boot device
The device from which the system bootstrap software is acquired.
boot flags
A flag is a system parameter set by the user. Boot flags contain information that
is read and used by the bootstrap software during a system bootstrap procedure.
boot server
A computer system that provides boot services to remote devices such as network
routers.
bootstrap
The process of loading an operating system into memory.
bugcheck
A software condition, usually the response to software’s detection of an ‘‘internal
inconsistency,’’ which results in the execution of the system bugcheck code.
bus
A collection of many transmission lines or wires. The bus interconnects computer
system components, providing a communications path for addresses, data, and
control information or external terminals and systems in a communications
network.
Glossary–2
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