Quantum EC-LLDAA-YF-B Guía de usuario Pagina 205

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Glossary
New Template 185
T TPI Tracks per Inch. A DLT 7000 tape drive, for example, writes data
a density of 416 tpi, or 208 tracks across the width of the half-
inch DLTtape media.
take-up reel The reel inside every DLT tape drive onto which DLTtape
media is wound. The in-the-drive take-up reel enables DLT tape
systems to operate using a single-reel cartridge and thereby
pack more tape and data into every cartridge.
tape path The path through which tape moves from the cartridge,
past the read/write head, and onto the take-up reel. The
patented DLT drive head guide assembly provides a gentle and
solid path that ensures tracking accuracy and long tape life.
tar A UNIX operating system command that stands for “create tape
archives” and/or extract files.
TCP/IP Transmission Control Protocol/Internet Protocol. A
communications protocol which ensures that the total amount
of bytes sent is received correctly, and also provides the routing
information.
thin film A type of coating allowing very thin layers of magnetic
material used on tape drive read/write heads. Media with thin
film surfaces can store greater amounts of data.
track A linear or angled pattern of data written on a tape surface. DLT
tape drives write information on multiple tracks simultaneously.
track-to-track seek time The time required for the read/write heads to
move to an adjacent track.
transfer rate The rate at which the drive sends and receives data from
the controller. Usually measured in megabytes per second. A
DLT 7000 drive, for example, has a native transfer rate of 5 MB/
s.
U unformatted capacity The total number of usable bytes on the
media, including the space that will be required later to record
location, boundary definitions, and timing information. See also
formatted capacity.
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