CAN/CSA-ISO/IEC 20061-04 (R2012)

Section 1 - General
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Conventions and notations
6 Acronyms
7 Environment and safety
Section 2 - Requirements for the case
8 Dimensional and mechanical characteristics of the case
Section 3 - Requirements for the unrecorded tape
9 Mechanical, physical and dimensional characteristics
   of the tape
10 Magnetic recording characteristics
11 Format for helical tracks
12 Track geometry
13 Method of recording helical tracks
14 Method of recording longitudinal tracks
Section 5 - Requirements for recorded information
15 Recorded information
Section 6 - Write operations
16 Write retry sequence (Figure 58)
17 Append file operation (Figure 59)
Annexes
A - Measurement of Signal-to-Noise Ratio
B - Representation 8/9 coding patterns
C - Recommendations for transportation
D - Inhibitor tape

Scope This International Standard specifies the physical and magnetic characteristics of magnetic tape cassettes, using magnetic tape 12,65 mm wide so as to provide physical interchange of such cassettes between drives. It also specifies the quality of the recorded signals, the recording method and the recorded format, called Digital Tape Format-2 (DTF-2), thereby allowing data interchange between drives by means of such cassettes. The format supports variable length Logical Records, high-speed search, and the use of a registered algorithm for data compression. This International Standard specifies two sizes of cassette. For the purposes of this International Standard the larger cassette is referred to as Type L, and the smaller as Type S. Together with a standard for volume and file structure, e.g. International Standard ISO 1001, this International Standard provides for full data interchange between data processing systems.

Scope This International Standard specifies the physical and magnetic characteristics of magnetic tape cassettes, using magnetic tape 12,65 mm wide so as to provide physical interchange of such cassettes between drives. It also specifies the quality of the recorded signals, the recording method and the recorded format, called Digital Tape Format-2 (DTF-2), thereby allowing data interchange between drives by means of such cassettes. The format supports variable length Logical Records, high-speed search, and the use of a registered algorithm for data compression. This International Standard specifies two sizes of cassette. For the purposes of this International Standard the larger cassette is referred to as Type L, and the smaller as Type S. Together with a standard for volume and file structure, e.g. International Standard ISO 1001, this International Standard provides for full data interchange between data processing systems.