Seagate Technology 10002475-003, Руководство по описанию продукции

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Glossary Appendix A
Product Description Manual Page 73
Magnetic Tape—A tape that accepts and retains magnetic signals intended for input, output, and
storage of data for information processing.
Media Header block—A unique block identifying the type of format being recorded.
Noise—A disturbance of the signal caused by the read channel, write channel, head/tape interaction,
or conducted or radiated sources.
Randomizing—A recoding of data symbols before they are written to tape in order to provide a
consistently uniform RF envelope level.
RLL (Run Length Limited)—A data encoding method where data bits are encoded so that certain
contraints are emt with regard to the maxmum and minimum distances between flux transitions.
Serpentine—A recording method in which tracks are laid down sequentially, and the tape is not
rewound at the end of a track. This recording method exploits the bidirectional capabilities of the
cartridge.
Streaming—A method of recording on magnetic tape that maintains continuous tape motion without
the requirement to start and stop within an interblock gap.
Tape Drive—A peripheral storage device that records data onto removable tape cartridges. Used to
back up a disk drive. (See also Disk Drive.)
Track—A longitudinal area on the tape along which magnetic signals can be serially recorded.
Track ID block—A block recorded in the Load Point and Early Warning regions to designate the
track number.
Uncorrected Bit Error Rate—The probability of a bit being in error, without using any error
correction techniques.
Underrun—A condition developed when the host transmits or receives data at a rate less than
required by the device for streaming operation.