Travan

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Travan is an 8 mm magnetic tape cartridge design developed by the 3M company, used for the storage of data in computer backups and mass storage. Over time, subsequent versions of Travan cartridges and drives have been developed that provide greater data capacity, while retaining the standard 8 mm width and 750' length. Travan is standardized under the QIC body.

The Travan format competes mainly against the DDS, AIT, and VXA formats.

Contents

[edit] Generations

Generation TR-1 TR-3 TR-4 TR-5 TR-7
Release date 1995 1995 1997 2002
Data capacity 400 MB 1.6 GB 4 GB 10 GB 20 GB
Max speed (MB/s) 0.25 0.5 1.2 2 4
Media format QIC-80 QIC-3020 QIC-3095
Min tape length (ft) 750 750 740 740 750
Tape tracks 36 50 72 108 108
Recording density (ftpi) 14,700 44,250 50,800 79,800 96,000

[edit] TR-1

  • Travan TR-1 cartridges offer a 400 MB native capacity with a 0.25 MB/s transfer rate using the QIC-80 media format.

[edit] TR-2

  • TR-2 was designed by 3M, but they never marketed it.
  • TR-2 cartridges were designed to have an 800 MB native capacity with a 0.25 MB/s transfer rate using the QIC-3010 media format.
  • The spec called for 50 tracks across the tape, with a recording density of 22,125 flux transitions per inch (ftpi).

[edit] TR-3

  • Travan TR-3 cartridges offer a 1.6 GB native capacity with a 0.5 MB/s transfer rate using the QIC-3020 media format.

[edit] TR-4

TR-4 cartridge
TR-4 cartridge
  • Travan TR-4 cartridges offer a 4 GB native capacity using the QIC-3095 media format.
  • Travan 8 GB cartridges offer a 4 GB native capacity with a 1.2 MB/s transfer rate.
  • Travan NS8 cartridges offer a 4 GB native capacity with a 1.2 MB/s transfer rate.
  • Imation HP Colorado 5 GB is a 460 ft variation on the TR-4 standard. It offered 2.5 GB native capacity, 1 MB/s transfer rate.

[edit] TR-5

  • Travan NS20 cartridges offer a 10 GB native capacity with a 2 MB/s transfer rate.
  • Travan 20 GB cartridges offer a 10 GB native capacity with a 2 MB/s transfer rate.

[edit] TR-7

  • Travan 40 GB cartridges offer a 20 GB native capacity with a 4 MB/s transfer rate.

[edit] External links

v • d • e
Magnetic tape data storage formats
Three Quarter Inch (19 mm)
Linear

LINCtape (1962) • DECtape (1963)

 Helical

Sony DIR (19xx) • Ampex DST (1992)
Half Inch (12.65 mm)
Linear

UNISERVO (1951) • IBM 7 track (1952) • 9 track (1964) • IBM 3480 (1984) • DLT (1984) • IBM 3590 (1995) • T9840 (1998) • IBM 3592 (?) • T9940 (2000) • LTO Ultrium (2000) • T10000 (2006)

 Helical

Redwood SD-3 (1995) • DTF (19xx) • SAIT (2003)
Eight Millimeter (8 mm)
Linear

Travan (1995) • IBM 3570 MP (1997) • ADR (1999)

 Helical

Data8 (1987) • Mammoth (1994) • AIT (1996) • VXA (1999)
Quarter Inch (6.35 mm)
Linear

QIC (1972) • SLR (1986) • Ditto (1992)
Eighth Inch (3.81 mm)
Linear

KC Standard, Compact Cassette (1975) • HP DC100 (1976) • Commodore Datassette (1977) • DECtapeII (1979)

 Helical

DDS/DAT (1989)
Stringy (1.58 - 1.9 mm)
Linear

Exatron Stringy Floppy (1979) • ZX Microdrive (1983) • Rotronics Wafadrive (1984)
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