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Glossary
SDLT 600 Product Manual 123
SRAM
Static RAM. A memory chip that requires power to hold its
content.
T
Take-up Reel The reel inside every tape drive onto which DLTtape or
Super DLTtape media is wound. The in-the-tape drive take-up reel
enables DLTtape and Super DLTtape systems to operate using a single-
reel cartridge and thereby pack more media and data into every
cartridge.
TapeAlert A firmware feature that monitors and returns the results of
the tape drive’s on-going self-diagnosis activity.
Tape Path The path through which media moves from the cartridge, past
the read/write head, and onto the take-up reel.
TCM The Tape Control Module implements the functions required to
buckle and unbuckle the media and control the media motion.
Termination A physical requirement of the SCSI bus. A terminator is a
device that attaches to both ends of an electrical bus and prevents
reflection or echoes of signals that reach the end of the bus.
Track A linear or angled pattern of data written on a media surface.
SDLT tape drives write information on multiple tracks simultaneously.
Transfer Rate The speed at which the data moves between a host (that is,
tape drive) and a recorded device. Usually expressed as bytes/sec or
bits/sec.
TTL Transistor-to-Transistor Logic is a class of digital circuits built from
bipolar junction transistors (BJT), diodes, and resistors. It is the base for
the semiconductor integrated circuit (IC) technology.
TUR Tape Unit Ready (see also Take-up Reel).
U
UL Underwriters Laboratories is a testing laboratory, which develops
standards for consumer products, chiefly dealing with product safety.
Unformatted Capacity The total number of usable byes on the media,
including the space that will be required later to record location,
boundary definitions, and timing information. (See also Native Capacity.)
Ultra320 An SDLT 600 tape drive SCSI interface that provides a low-
voltage differential (LVD) mode running up to 160 MB/sec.
USB Universal Serial Bus is a serial bus standard for connecting devices
to a computer.
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