AS 3606.2-1988

1 - AS 3606.2-1988 INFORMATION PROCESSING DATA INTERCHANGE ON 6.30 mm MAGNETIC TAPE CARTRIDEGE USING GCR RECORDING AT 394 ftpmm,
4 - PREFACE
5 - Contents
7 - 1 Scope and field of application
7 - 2 Conformance
7 - 3 References
7 - 4 Hexadecimal notation
8 - 5 Reference plane
8 - 6 Track geometry
8 - 6.1 Track location
8 - 6.2 Number of tracks
8 - 6.2.1 4-track format
8 - 6.2.2 9-track format
8 - 6.3 Track width
8 - 7 Recording
8 - 7.1 Method of recording
8 - 7.2 Physical recording densities
8 - 7.3 Average bit cell length variations
8 - 7.3.1 Average bit cell length
8 - 7.3.2 Long-term average bit cell length
8 - 7.3.3 Short-term average bit cell length
8 - 7.4 Fl ux transition spacing
8 - 7.4.1 Instantaneous flux transition spacing
8 - 7.4.2 Rate of change of average flux transition spacing
11 - 7.5 Signal ampl itude of a recorded cartridge for data interchange
11 - 7.5.1 Average signal amplitude at nominal maximum density
11 - 7.5.2 Minimum signal amplitude
11 - 7.5.3 Maximum signal amplitude
11 - 8 Erasure
11 - 9 Recording offset angle
11 - 10 Use of tracks
11 - 10.1 4-track format
11 - 10.2 9-track format
12 - 10.3 Summary of requirements for use of use of tracks and Reference Burst
12 - 11 Coded representation of the data
12 - 11.1 General
12 - 11.2 Coding methods
13 - 12 Recording of coded characters on the tape
14 - 13 Track format
14 - 13.1 Data Block
14 - 13.1.1 Preamble
14 - 13.1.2 Block Marker
14 - 13.1.3 Data
14 - 13.1.4 Block Address
14 - 13.1.5 CRC (Cyclic Redundancy Check)
15 - 13.1.6 Postamble
15 - 13.2 File Mark Block
15 - 13.3 Control Blocks
15 - 13.4 Use of Control Blocks
15 - 13.4.1 Track 0
15 - 13.4.2 Further uses of Control Blocks
16 - 14 End of recorded data
16 - 15 Re-writing operations
16 - 15.1 Re-writing rules
16 - 15.2 Rejection criterion
16 - 16 Updating operations
16 - 17 Reading operations
17 - Annex - Example of writing operations

Specifies the characteristics of a tape cartridge loaded with magnetic tape 6.30 mm wide intended for digital recording. This Standard is identical with ISO 8462-2:1986.

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.