BS 7080-2:1989

National foreword
Committees responsible
Guide
1. Scope and field of application
2. Conformance
3. References
4. Hexadecimal notation
5. Reference plane
6. Track geometry
7. Recording
8. Erasure
9. Recording offset angle
10. Use of tracks
11. Coded representation of the data
12. Recording of coded characters on the tape
13. Track format
14. End of recorded data
15. Re-writing operations
16. Updating operations
17. Reading operations
Annex
Example of writing operations

Explains the characteristics of a tape cartridge loaded with magnetic tape 6,30 mm wide for digital recording at physical recording densities of 252 ftpmm and 394 ftpmm. Specifies the mechanical, physical and magnetic properties of a 6,30 mm wide magnetic tape cartridge and methods for testing the surface quality of the tape. It gives the environmental conditions under which the cartridge shall be tested and operated, and recommends conditions for storage.

ISO 8462 specifies the characteristics of a tape cartridge loaded with magnetic tape 6,30 mm (0.25 in) wide intended for digital recording at physical recording densities of 252 ftpmm (6 400 ftpi) and 394 ftpmm (10 000 ftpi).

ISO 8462-1 specifies the mechanical, physical and magnetic properties of a 6,30 mm (0.25 in) wide magnetic tape cartridge and methods for testing the surface quality of the tape. It also specifies the environmental conditions under which the cartridge shall be tested and operated, and recommends conditions for storage.

This part of ISO 8462 specifies a recording method and a data format intended for use in the streaming mode of operation. Two alternative track formats are specified:

• a 4-track format, and
• a 9-track format.

ISO 8462-1 and ISO 8462-2 provide for the physical interchange of cartridges between data processing systems, and specify a data format. A labelling standard for tape cartridges used in the streaming mode is under study. The availability of such a labelling standard will provide for full data interchange between data processing systems.

NOTE Numeric values in the SI and/or Imperial measurement system in this part of ISO 8462 may have been rounded off and therefore are consistent with, but not exactly equal to, each other. Either system may be used, but the two should be neither intermixed nor reconverted. The original design was made using the Imperial measurement system.