Dell™ PowerVault™ 220S and 221S Systems User's Guide
The following list defines or identifies technical terms, abbreviations, and acronyms used in Dell™ documents.
Abbreviation for ampere(s).
Abbreviation for alternating current.
A diagnostic message in the form of a pattern of beeps from your system's speaker. For example, one beep, followed by a second beep, and then a burst of three beeps is beep code 1-1-3.
British Thermal Unit, a measurement of heat output
An information pathway between the components of a system. Your system contains an expansion bus that allows the microprocessor to communicate with controllers for all the various peripheral devices connected to the system. Your system also contains an address bus and a data bus for communications between the microprocessor and RAM.
Abbreviation for Celsius.
As they relate to DMI, manageable components are operating systems, computer systems, expansion cards, or peripherals that are compatible with DMI. Each component is made up of groups and attributes that are defined as relevant to that component.
A chip that controls the transfer of data between the microprocessor and memory or between the micro-processor and a peripheral device such as a disk drive or the keyboard.
Abbreviation for direct current.
Acronym for Deutsche Industrie Norm.
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.
Acronym for electrically erasable programmable read-only memory.
Acronym for Enclosure Management Module.
Acronym for erasable programmable read-only memory.
Your system contains an expansion bus that allows the microprocessor to communicate with controllers for peripheral devices, such as a network card or an internal modem.
Abbreviation for Fahrenheit.
Abbreviation for gigabyte(s). A gigabyte equals 1,024 megabytes or 1,073,741,824 bytes.
A host adapter implements communication between the system's bus and the controller for a peripheral device. (Hard-disk 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.
Abbreviation for hertz.
Abbreviation for input/output. The keyboard is an input device, and a printer is an output device. In general, I/O activity can be differentiated from computational activity. For example, when a program sends a document to the printer, it is engaging in output activity; when the program sorts a list of terms, it is engaging in computational activity.
Abbreviation for 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 microprocessor. Each peripheral connection must be assigned an IRQ number. For example, the first serial port in your system (COM1) is assigned to IRQ4 by default. Two devices can share the same IRQ assignment, but you cannot operate both devices simultaneously.
Kilo, indicating 1,000.
Abbreviation for light-emitting diode. An electronic device that lights up when a current is passed through it.
On a system with local-bus expansion capability, certain peripheral devices (such as the video adapter circuitry) can be designed to run much faster than they would with a traditional expansion bus. Some local-bus designs allow peripherals to run at the same speed and with the same width data path as the system's microprocessor.
Abbreviation for megabyte(s). The term megabyte means 1,048,576 bytes; however, when referring to hard-disk drive storage, the term is often rounded to mean 1,000,000 bytes.
Abbreviation for megahertz.
Abbreviation for millisecond(s).
A text file included with a software package or hardware product that contains information supplementing or updating the documentation for the software or hardware. Typically, readme files provide installation information, describe new product enhancements or corrections that have not yet been documented, and list known problems or other things you need to be aware of as you use the software or hardware.
Abbreviation for revolutions per minute.
Acronym for SCSI accessed fault tolerant enclosure.
Acronym for small computer system interface. An I/O bus interface with faster data transmission rates than standard ports. You can connect up to seven devices (15 for some newer SCSI types) to one SCSI interface.
Abbreviation for SCSI device management system.
Abbreviation for second(s).
Acronym for SCSI enclosure services.
Abbreviation for Simple Network Management Protocol. SNMP is an industry-standard interface that allows a network manager to remotely monitor and manage workstations.
As the main circuit board, the system board usually contains most of your system's integral components, such as the following:
Frequently used synonyms for system board are motherboard and logic board.
Abbreviation for uninterruptible power supply. A battery-powered unit that automatically supplies power to your system in the event of an electrical failure.
Abbreviation for volt(s).
Abbreviation for volt(s) alternating current.
Abbreviation for watt(s).
A warm-pluggable component can be removed and installed while the system is powered on. However, all I/O activity must be terminated before the component is replaced.