IBM 3580-L11 Setup Guide - Page 103
Glossary, Ultrium Tape Drive.
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Glossary This glossary defines the special terms, abbreviations, and acronyms that are used in this publication. Numbers 2:1 compression. The relationship between the quantity of data that can be stored with compression as compared to the quantity of data that can be stored without compression. In 2:1 compression, twice as much data can be stored with compression as can be stored without compression. 3580 Ultrium Tape Drive. A device that can be attached to a supported server (host) and used to write data to and from magnetic tape. The 3580 Tape Drive can process a tape cartridge with a capacity of 100 GB at a data transfer rate of 15 MB per second. The drive within the device is the IBM Ultrium Tape Drive. A A. Ampere. ac. Alternating current. adapter card. A circuit board that adds function to a computer. alternating current (ac). An electric current that reverses its direction at regularly recurring intervals. amp. Ampere. ampere (A, amp). A unit of measure for electric current that is equivalent to a flow of one coulomb per second, or to the current produced by one volt applied across a resistance of one ohm. archive. To collect and store files in a designated place. B bar code. A code representing characters by sets of parallel bars of varying thickness and separation which are read optically by transverse scanning. bar code label. A specially coded label that can be affixed to a tape cartridge and which enables a device to identify the cartridge and its volume serial number. bit. Either of the digits 0 or 1 when used in the binary numbering system. browser. A client program that initiates requests to a Web server and displays the information that the server returns. © Copyright IBM Corp. 2000 British thermal unit (Btu). The quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit at a specified temperature. Btu. British thermal unit. bus. See SCSI bus. byte. A string consisting of a certain number of bits (usually 8) that are treated as a unit and represent a character. A fundamental data unit. C capacity. The amount of data that can be contained on storage media and expressed in bytes of data. cartridge. See tape cartridge. cartridge door. On a tape cartridge, a barrier that can be opened to access, or closed to protect, the magnetic tape within the cartridge. cartridge load compartment. On the front of the 3580 Tape Drive, the opening into which you insert a tape cartridge. cartridge memory. See LTO cartridge memory. cartridge manual rewind tool. A device that can be fitted into the reel of a cartridge and used to rewind tape into or out of the cartridge. CD. Compact disc. centimeter (cm). One one-hundredth of a meter (0.01 m). Approximately 0.39 inch. circuit breaker. A switch that automatically interrupts an electric circuit under an infrequent abnormal condition. cleaning cartridge. A tape cartridge that is used to clean the heads of a tape drive. Contrast with data cartridge. cm. Centimeter. compact disc (CD). A disc, usually 4.75 inches in diameter, from which data is read optically by means of a laser. compression. The process of eliminating gaps, empty fields, redundancies, and unnecessary data to shorten the length of records or blocks. configure. To describe to a system the devices, optional features, and programs installed on the system. 87