Glossary

device

(1)Mechanical, electrical, or electronic hardware with a specific purpose (D). See also managed product.

(2)See node.

diagnostics

(1)The process of investigating the cause or nature of a problem in a product or system. (2) Procedures or tests used by computer users and service personnel to diagnose hardware or software problems (D).

dialog box

A pop-up window in the user interface with informational messages or fields to be modified or completed with desired options.

direct current

DC. Electric current that continuously flows in one direction (D). Contrast with alternating current.

director

An intelligent, highly-available, Fibre Channel switch providing any-to-any port connectivity between nodes (end devices) on a switched fabric. The director sends data transmissions (data frames) between nodes in accordance with the address information present in the frame headers of those transmissions.

diskette

A thin magnetic disk enclosed in a plastic jacket, which is removable from a computer and is used to store and transport data (D).

diskette drive

The hardware mechanism by which a computer reads data from and writes data to removable diskettes (D).

DNS name

Domain name system or domain name service. Host or node name for a device or managed product that is translated to an Internet protocol (IP) address through a domain name server.

domain

A Fibre Channel term describing the most significant byte in the node port (N_Port) identifier for the Fibre Channel device. It is not used in the Fibre Channel small computer system interface (FC-SCSI) hardware path ID. It is required to be the same for all SCSI targets logically connected to a Fibre Channel adapter.