BS 7080-1:1989

National foreword
Committees responsible
Guide
1. Scope and field of application
2. Conformance
3. Reference
4. Definitions
5. Environment and transportation
6. Characteristics of the tape
7. Characteristics of the cartridge
Annexes
A. Measurement of light transmittance
B. Layer-to-layer adhesion
C. Instantaneous speed variation
D. Tape tension
E. Electrical resistance of the belt capstan
Figures
1. Position of the markers and recording areas
    (magnetic surface shown)
2. Cartridge diagram
3. Cartridge dimensions
4. Cartridge locating planes
5. Light sensing
6. File protect and cartridge-in-position sensing
7. Cartridge door profile
8. Label area
9. Tape path and drive dimensions
10. Measuring device
11. Measuring mask
12. Test for layer-to-layer adhesion
13. Standard loop
14. Suppression function
15. Maximum allowable ISV
16. Test rod
17. Test fixture
Table
Dimensions of the rod

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 a recording method and a data format for use in the streaming mode of operation. Two alternative track formats are specified: a 4 track and 9 track format. Gives 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.

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 8462-2 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.

This part of ISO 8462 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.

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.