Promise Technology 66 Pro user manual Array, Bit, Bootstrap, Byte

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SuperTrak66™ User's ManualAppendix G

 

Glossary of Terms

API

Application Programming Interface: A software layer which provides a

 

common method of accessing several types of hardware or other

 

software that it supports. APIs reduce the technical expertise needed

 

for applications to be able to support a wide array of hardware devices

 

and software packages directly.

array

As used in RAID, an array consists of one or more hard drives which

 

are logically combined to form a single storage drive. Arrays are

 

categorized by the method in which they are accessed to logically

 

organize data on them for purposes of performance enhancement,

 

capacity augmentation, and/or data redundancy protection.

ATA

AT Attachment: A standard for interfacing peripheral devices to

 

“PC/AT compatible” machines.

BIOS

Basic Input/Output Set: Typically a set of system instructions stored

 

in ROM or NVRAM that contain a rudimentary foundation for system

 

initialization and operation. These programs provide just enough

 

support to allow an O/S to load and take over the PC operations, or to

 

provide a backward-compatible API to interface with new types of

 

devices to a system otherwise unsuited to handle such devices.

bit

The fundamental representation of a numeric digit in the binary (base 2)

 

numbering system. A bit consists of the value 1 or 0 (also referenced

 

as “ON/OFF” and “TRUE/FALSE”, respectively). By grouping bits

 

together, the combinations of values that the bit groups represent

 

increase exponentially, forming the basis of binary numbering. The

 

most basic access to a collection of bits is a byte.

boot

A term describing the process of a computer system initializing itself

 

and loading an O/S from a disk drive, network connection, or other

 

source.

bootstrap

The first sector of a partition containing executable machine code

 

information. The machine code contained here provides enough

 

instruction to tell the system how to begin loading the rest of the O/S

 

from disk to memory. If there is no O/S installed on a drive, this sector

 

usually contains code which prints a message “Insert system disk..”

 

or similar. Often, a program called a “boot manager” may be installed

 

onto a drive which installs itself to give the operator further O/S loading

 

options from various drive partitions in the system.

byte

The most basic data chunk that is directly accessible to i80x86

 

microprocessors (and many others). A byte consists of exactly 8 bits.

G-1

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Promise Technology 66 Pro user manual Array, Bit, Bootstrap, Byte