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The 8 mm backup format is a discontinued magnetic tape data storage format used in computer systems, pioneered by Exabyte Corporation. It is also known as Data8, often abbreviated to D8 and is written as D-Eight on some Sony branded media. Such systems can back up up to 60 GB of data depending on configuration. The cassettes have the same dimensions and construction as the cassettes used in 8 mm video format recorders and camcorders.
Until the advent of AIT, Exabyte was 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 helical scan videotape technology that was available then.
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.
Metal Particle (MP) Data8 cartridges are essentially identical to Video8 cassettes and can be used for video recording. Similarly, Video8 cassettes will work in Data8 drives capable of using MP tape.




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)

=

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 its 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.

1987—EXB-8200
Full-height form factor
246 kB/s data transfer rate
EXB-8200SX model features high-speed search
EXB-8205: Up to 5.0 GB on one 112 m data cartridge (assuming 2:1 compression ratio)
EXB-8205XL: Up to 7.0 GB on one 160 m data cartridge (assuming 2:1 compression ratio)
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
500 kB/s data transfer rate (uncompressed) / 1.0 MB/s data transfer rate (assuming a 2:1 compression ratio)
Up to 10.0 GB on one 112 m data cartridge (assuming 2:1 compression ratio)
1994—EXB-8505XL
Half-height form factor
500 kB/s data transfer rate (uncompressed) / 1.0 MB/s data transfer rate (assuming a 2:1 compression ratio)
Up to 14.0 GB on one 160 m XL data cartridge (assuming 2:1 compression ratio)
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 a 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


Digital Data Storage




External links


A brief history of tape according to Exabyte
Much Ado About Exabyte
Identifying MammothTape and 8 mm tape drives
Mammoth-2 Product Specification
Technical details for several Data8 products




= 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]

Kata Kunci Pencarian:

• Tape drive
• Data8
• 8 mm video format
• Exabyte Corporation
• Digital Data Storage
• D8
• Tape drive
• List of cassette tape and cartridge tape formats
• Linear Tape-Open
• Magnetic-tape data storage
• Gatsibo District

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