Glossary
SuperLoader 3 Autoloader User’s Guide
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supply reel
The reel of tape contained within the DLTtape cartridge.
DLTtape IV, for example, contains 1,800 feet (548.64 m) of tape.
surface
The side of the tape that is coated with the magnetic material for
recording data.
sustained transfer rate
The data transfer rate of a tape drive in native
mode. for example, the DLT 7000 has a sustained transfer rate of
5 MB in native mode, and up to 10 MB at 2:1 compression.
system manufacturers
Makers of computer systems and tape library
systems.
Symmetric Phase Recording (SPR)
A recording technique introduced
with the DLT 7000 that writes data at alternating angles in a
herringbone pattern thereby eliminating the need for guard
bands between data tracks, and providing higher data density.
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.
