User Guide

A-4 Ampex 1308911-02
Model No.
Running Head
Glossary Glossary and Acronyms
Driver See Device Driver.
DST Data Storage Technology, a registered trademark of Ampex
Corporation, identifies the technology used in storage products
designed around the DD-2 medium format.
DST 310 A DST tape drive that uses the fast and wide SCSI-2 protocol to issue
commands and transfer data.
DST Cartridge A high-capacity data storage magnetic tape cartridge that meets the
ANSI DD-2 standard. Cartridges come in three sizes: small (4.3 x 6.8
inches), medium (5.9 x 10 inches), and large (8.1 x 14.4 inches).
DST Driver a Unix device driver that provides a programmatic interface to DST
tape drives.
DST Tape Drive A high-performance helical scan tape drive capable of reading and
writing 19mm Data D-2 (DD-2) cartridges. A DST tape drive has a set
of configurable attributes that control drive behavior. Also, statistical
and diagnostic data is available for each of the drive internal
components.
Early Warning (EW)
A position located a configurable number of double frames before the
end of a partition. The EW position usually leaves enough space before
EOP to flush the entire tape drive data buffer to the tape. The EW is set
for the drive in general and is not associated with any particular tape
or partition.
Eject To disengage a cartridge from a DST tape drive so that it can be
removed, either by hand or automatically by a cartridge handling
system. During normal operation, before ejecting a cartridge to the
load port, the drive positions to the first system zone in the BOT
direction, unthreads the tape, and invalidates all state information. A
cartridge may be manually ejected by selecting EJECT on the DST
front panel and pressing the EJECT button. In that case the tape may
eject without moving to a system zone. See Unload.
End of Data (EOD) The tape location immediately after the last valid data block or
filemark written on a partition. EOD is where new data is appended to
the end of the previously-written data. There is no obtainable user data
beyond EOD, so if, for example, a partition consists of three files, and
data is appended to the first file, data in the second and third files is no
longer accessible.
End of File (EOF) The tape position located immediately after the last valid data block in
a file.