Dell PowerEdge 6650 - Manual (Page 35)

DDR
Abbreviation for double-data rate.
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.
Diagnostics
A comprehensive set of tests for your system. Refer to your Installation and Troubleshooting Guide for more information about using diagnostics.
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.
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 drive C. Additional directories that branch off the root directory are called subdirectories.
Subdirectories may contain additional directories branching off 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.
DRAC
Abbreviation for Dell™ Remote Access 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.
DVD
Abbreviation for digital versatile disk.
ECC
Abbreviation for error checking and correction.
EEPROM
Acronym for electrically erasable programmable read-only memory.
EISA
Acronym for Extended Industry-Standard Architecture, a 32-bit expansion-bus design. The expansion-card connectors in an EISA system are also compatible
with 8- or 16-bit ISA expansion cards.
To avoid a configuration conflict when installing an EISA expansion card, you must use the EISA Configuration Utility. This utility allows you to specify which
expansion slot contains the card and obtains information about the card's required system resources from a corresponding EISA configuration file.
EMC
Abbreviation for Electromagnetic Compatibility.
EMI
Abbreviation for electromagnetic interference.
ESD
Abbreviation for electrostatic discharge.
ESM
Abbreviation for embedded server management. ESM allows you to perform remote, or "out-of-band," server management on your network server using a
DRAC III.