Handbook

GLOSSARYG.18
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 instance,the DLT 8000 has a sustained transfer rate
of 6MB/s in native mode,and up to 12MB/s at 2:1 compression.
Symmetric Phase Recording (SPR).A recording technique used by
the DLT 8000 drive 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.
System Manufacturers.Makers of computer systems and tape
library systems.
T
TPI. Acronym for tracks per inch.A DLT 8000 drive, for instance,
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 DLTtape drive onto which
DLTtape media is wound. The in-the-drive take-up reel enables
DLTtape 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 DLTtape drive head guide assembly provides a gentle and
solid path that ensures tracking accuracy and long tape life.
Ta r. A UNIX operating system command that stands for “create
tape archives”and/or extract files.
Terabyte (TB). A unit of measure consisting of one trillion bytes
(one thousand gigabytes).