Dell PowerEdge 400SC User Manual

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host adapter

A host adapter implements communication between the system's bus and the controller for a peripheral device. (Hard-drive controller subsystems include

integrated host adapter circuitry.) To add a SCSI expansion bus to your system, you must install or connect the appropriate host adapter.

Hertz

I/O

Input/output. A keyboard is an input device, and a monitor is an output device. In general, I/O activity can be differentiated from computational activity.

Identification

IDE

Integrated drive electronics

integrated mirroring

Provides simultaneous physical mirroring of two drives. Integrated mirroring functionality is provided by the system's hardware. See also mirroring.

internal processor cache

An instruction and data cache built into the processor

Internet Protocol

IPX

Internetwork Packet eXchange

IRQ

Interrupt request. A signal that data is about to be sent to or received by a peripheral device travels by an IRQ line to the processor. Each peripheral

connection must be assigned an IRQ number. Two devices can share the same IRQ assignment, but you cannot operate both devices simultaneously.

jumper

Small blocks on a circuit board with two or more pins emerging from them. Plastic plugs containing a wire fit down over the pins. The wire connects the pins

and creates a circuit. Jumpers provide a simple and reversible method of changing the circuitry in a board.

Kilo-, indicating 1000

Kilobit(s); 1024 bits

Kilobyte(s);1024 bytes

Kbps

Kilobit(s) per second