Travan

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Travan is a type of 8 mm magnetic tape cartridge 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.

1 Generations
- 1.1 TR-1
- 1.2 TR-2
- 1.3 TR-3
- 1.4 TR-4
- 1.5 TR-5
- 1.6 TR-7
2 External links

[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

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

view • talk • edit	Magnetic tape data storage formats
	Linear	Helical-Scan
Three Quarter Inch (~19 mm)	LINCtape (1962) - DECtape (1963)	Sony DIR (19xx) - Ampex DST (1992)
Half Inch (12.65 mm)	UNISERVO (1951) - IBM 7 Track (1952) - IBM 9 Track (1964) - IBM 3480 (1984) - DLT (1984) - IBM 3590 (1995) - T9840 (1998) - T9940 (2000) - LTO Ultrium (2000) - T10000 (2006)	Redwood SD-3 (1995) - DTF (19xx) - SAIT (2003)
Eight Millimeter (8 mm)	Travan (1995) - IBM 3570 MP (1997)	Exabyte (1987) - Mammoth (1994) - AIT (1996) - VXA (1999)
Quarter Inch (6.35 mm)	QIC (1972) - SLR (1986)
Four Millimeter (3.8 mm)	DC100 (1976) - DECtapeII (1979)	DDS/DAT (1989)
One Eighth Inch (3.18 mm)	KC Standard, Compact Cassette (1975) - Datassette (1977)
Stringy (1.58 - 1.9 mm)	Exatron Stringy Floppy (1979) - ZX Microdrive (1983) - Rotronics Wafadrive (1984)