Dell PowerEdge 2500SC - Manual (Page 41)

Abbreviation for adjusted decibel(s).
DC
Abbreviation for direct current.
Dell Diagnostics
A comprehensive set of diagnostic tests for your Dell system. To use the diagnostics, you must boot your system from the Dell Diagnostics Diskette. Refer to your
Diagnostics and Troubleshooting Guide for more information about using the Dell Diagnostics.
Dell Inspector
A DMI browser that allows you to view your system's current hardware configuration and operating system version. If your system includes Dell-installed software,
you can select this program from the Dell Accessories program folder.
device driver
A program that allows the operating system or some other program to interface correctly with a peripheral device, such as a printer. Some device drivers—such as
network drivers—must be loaded from the config.sys file (with a device= statement) or as memory-resident programs (usually, from the autoexec.bat file). Others—
such as video drivers—must load when you start the program for which they were designed.
DIMM
Acronym for dual in-line memory module. A small circuit board containing DRAM chips that connects to the system board.
DIN
Acronym for Deutsche Industrie Norm.
DIP
Acronym for dual in-line package. A circuit board, such as a system board or expansion card, may contain DIP switches for configuring the circuit board. DIP switches
are always toggle switches, with an ON position and an OFF position.
directory
Directories help keep related files organized on a disk in a hierarchical, "inverted tree" structure. Each disk has a "root" directory; for example, a C:\> prompt normally
indicates that you are at the root directory of hard-disk drive C. Additional directories that branch off of the root directory are called subdirectories. Subdirectories
may contain additional directories branching off of them.
DMA
Abbreviation for direct memory access. A DMA channel allows certain types of data transfer between RAM and a device to bypass the microprocessor.
DMI
Abbreviation for Desktop Management Interface. DMI enables the management of your system's software and hardware. DMI collects information about the system's
components, such as the operating system, memory, peripherals, expansion cards, and asset tag. Information about the system's components is displayed as a MIF file
or through the Dell Inspector program.
DPMS
Abbreviation for Display Power Management Signaling. A standard developed by the Video Electronics Standards Association (VESA
®
) that defines the hardware
signals sent by a video controller to activate power management states in a monitor. A monitor is said to be DPMS-compliant when it is designed to enter a power
management state after receiving the appropriate signal from a system's video controller.
DRAC
Acronym for Dell OpenManage Remote Assistant Card.
DRAM
Abbreviation for dynamic random-access memory. A system's RAM is usually made up entirely of DRAM chips. Because DRAM chips cannot store an electrical
charge indefinitely, your system continually refreshes each DRAM microprocessor in the system.
drive-type number
Your system can recognize a number of specific hard-disk drives. Each is assigned a drive-type number that is stored in NVRAM. The hard-disk drive(s) specified in
your system's System Setup program must match the actual drive(s) installed in the systemsystem. The System Setup program also allows you to specify physical
parameters (logical cylinders, logical heads, cylinder number, and logical sectors per pack) for drives not included in the table of drive types stored in NVRAM.
DTE
Abbreviation for data terminal equipment. Any device, such as a systemsystem, that can send data in digital form by means of a cable or communications line. The DTE