Data8

8 mm Tape

The 8 mm Backup Format is a magnetic tape data storage format used in computer systems, pioneered by Exabyte Corporation. It is also known as Data8. Such systems can back up up to 40 GB of data depending on configuration. The tapes used are mechanically the same as the tapes used in 8 mm video format recorders and camcorders.

Until the advent of AIT, Exabyte were the sole vendor of 8 mm format tape drives. The company was formed with the aim of taking the 8 mm video format and making it suitable for data storage. They did so by building a reliable mechanism and data format that used the common 8 mm video tape technology that was available then. This was the first form of helical scan tape used commercially for data storage.

Exabyte's first 8 mm tape drive was made available in 1987. This was followed up with their Mammoth tape drive in 1996, and the Mammoth-2 (M2) in 1999.

Exabyte's drive mechanisms were frequently rebranded and integrated into UNIX systems.

Contents

Generations

NOTE: The AIT and VXA formats and some other less common formats also use 8 mm wide tape, but are completely incompatible.

Compatibility between tapes and drives and native capacities (GB)

MP AME AME w/ SmartClean
15 m 54 m 112 m 160 m 22 m 45 m 125 m 170 m 75 m 150 m 225 m
EXB-8200 Y Y 2.4
EXB-8205 Y Y Y
EXB-8205 XL Y Y Y Y
EXB-8500 Y Y 5
EXB-8505 Y Y 5
EXB-8505 XL Y Y 5 7
EXB-8700 Y Y Y Y
Eliant 820 Y Y 5 7
Mammoth (EXB-8900) RO RO RO RO 2.5 Y 14 20
Mammoth-LT RO RO RO RO 2.5 Y 14
Mammoth-2 6 12 33 45 20 40 60

Legend:

  • RO - The tape drive can read this tape, but not write. (Read Only)
  • Y - The tape drive can read and write this tape, but size is not known.
  • Numbered entries indicate the native storage capacity (in GB) for this combination of tape and drive.

Exabyte 8 mm

These drives use Metal Particle (MP) tape.

EXB-8200
  • 1987 -- EXB-8200
    • Full-Height form factor
    • 246 kB/s data transfer rate
    • EXB-8200SX model features high-speed search
  • 1990 -- EXB-8500
    • Full-Height form factor
    • 500 kB/s data transfer rate
    • EXB-8500c model features hardware data compression
  • 1992 -- EXB-8505
    • Half-Height form factor
  • 1994 -- EXB-8505XL
    • Half-Height form factor
    • 500 kB/s data transfer rate
  • 1995 -- EXB-8700
    • Tabletop (top-loading) form factor
    • 8700 model included generic backup software
    • 8700LT model included no software
    • 8700SW included Cheyenne backup software
  • 1998 -- Eliant 820
    • Half-Height form factor

Mammoth

These drives use Advanced Metal Evaporated (AME) tape, but could also read (but not write) MP tapes.

  • 1996 -- EXB-8900 Mammoth
    • 3 MB/s data transfer rate
    • LCD on drive displayed drive status
  • 1999 -- Mammoth-LT
    • No LCD

Mammoth-2 (M2)

These drives used Advanced Metal Evaporated (AME) tape with an 2 m integrated cleaning tape header called Smart Clean.

  • 1999 -- Mammoth-2
    • 12 MB/s data transfer rate
    • 4.6 cm/s tape speed during normal read/write operations
    • 1.6 m/s tape speed during search and rewind operations
    • 17 s load time, from insertion to ready
    • ALDC hardware data compression, 1 kB compression buffer

See also

External links

Standards

  • ECMA-145 ISO/IEC 11319:1991 First specification for 8 mm tape data storage. [1]
  • ECMA-169 ISO/IEC 12246:1993, Specification of DA-1 (dual azimuth extension). [2]
  • ECMA-249 ISO/IEC 15757, Specification of DA-2 (MammothTape). [3]
  • ECMA-293 ISO/IEC 18836, Specification of MammothTape-2. [4]

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Petit appartement du roi — Infobox| title = caption = Plan of the petit appartement du roi ca. 1693 headerstyle = background:#ccf; labelstyle = background:#ddf;header1= Key to the plan of the petit appartement du roi | label2=1 data2=Salon du billard (cabinet des chiens)… …   Wikipedia

  • Tape drive — DDS tape drive. Above, from left right: DDS 4 tape (20 GB), 112m Data8 tape (2.5 GB), QIC DC 6250 tape (250 MB), and a 3.5 floppy disk (1.44 MB) A tape drive is a data storage device that reads and performs digital recording, writes data on a… …   Wikipedia

  • Magnetic tape data storage — uses digital recording on to magnetic tape to store digital information. Modern magnetic tape is most commonly packaged in cartridges and cassettes. The device that performs actual writing or reading of data is a tape drive. Autoloaders and tape… …   Wikipedia

  • Petit appartement de la reine — Infobox| title = caption = Plan of the petit appartement de la reine ca. 1740 headerstyle = background:#ccf; labelstyle = background:#ddf;header1=Key to the plan of the petit appartement de la reine | label2=1 data2=escalier label3=2… …   Wikipedia

  • 8 mm — may refer to:* 8mm (band) * 8 mm film, or its replacement Super 8 mm film and Single 8 film * 8mm (film) ndash; about a private detective trying to verify the authenticity of a snuff film. * 8 mm video format ndash; a type of video recorder and… …   Wikipedia

  • Digital Data Storage — This article is about a particular data storage media. For the general meaning, see data storage device. Digital Data Storage (DDS) is a format for storing computer data on a Digital Audio Tape (DAT). DDS uses tape with a width of 3.8mm, with the …   Wikipedia

  • Philippine general election, 2004 — Infobox Election election name = Philippine general election, 2004 country = Philippines type = presidential ongoing = no previous election = Philippine general election, 2001 previous year = 2001 next election = Philippine general election, 2007 …   Wikipedia

  • England cricket team — Infobox abovestyle = background:inherit; border bottom:groove; labelstyle = background:inherit; belowstyle = background:inherit; text align:right; above = England caption = label1 = Test status granted data1 = 1877 label2 = First Test match data2 …   Wikipedia

  • Digital Linear Tape — A Super DLT I tape cartridge Digital Linear Tape (DLT) (previously called CompacTape) is a magnetic tape data storage technology developed by Digital Equipment Corporation (DEC) from 1984 onwards. In 1994 the technology was purchased by Quantum… …   Wikipedia

  • DECtape — PDP 11 with TU56 dual DECtape unit. Note the 6 armed starfish hubs holding circular white tape reels in place. Read/write heads are housed in the white vertical rectangles above the tape reels. DECtape, originally called Microtape , was a… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.