Digital Tape Format
Digital Tape Format is a magnetic tape data storage format developed by Sony. It uses a 1/2" wide tape, in a cassette with two reels, which is written and read with a helical scan process. The format is described by the ECMA 248 (adopted June 1998) and ISO/IEC 15731 standards. There are two sizes of tape cassettes, "S" and "L".
Generations
| Generation | DTF-1 | DTF-2 |
|---|---|---|
| Release Date | 1994 | 1999 |
| "S" Capacity (GB) | 12 | 60 |
| "L" Capacity (GB) | 42 | 200 |
| Max Speed (MB/s) | 12 | 24 |
Notes:
- Both used ALDC compression
- DTF-2 used Fibre Channel or SCSI interfaces
- The tape cassettes are similar to those of Sony Betacam.
External links
- ECMA 248 Specification of DTF-1. [1]
- ECMA 315 Specification of DTF-2. [2]
- Brochure for DTF-1 drive with specs
- DTF at the Computer Desktop Encyclopedia, including images
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Magnetic-tape data storage formats
| Wide (19–25.4 mm) |
|
|---|---|
| Half inch (12.7 mm) |
|
| Eight millimeter (8 mm) |
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| Quarter inch (6.35 mm) | |
| "Eighth" (0.15) inch (3.81 mm) |
|
| Stringy (1.58–1.9 mm) |
|
| Three quarter inch (19 mm) | |
|---|---|
| Half inch (12.7 mm) |
|
| Eight millimeter (8 mm) | |
| Four millimeter (3.81 mm) |
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