BS ISO/IEC 13421:1993

Section 1 - General
1 Scope
2 Conformance
2.1 Magnetic tape cartridges
2.2 Generating systems
2.3 Receiving systems
3 References
4 Definitions
4.1 Average Signal Amplitude
4.2 azimuth
4.3 back surface
4.4 Beginning-Of-Tape marker (BOT)
4.5 byte
4.6 cartridge
4.7 Cyclic Redundancy Check (CRC) character
4.8 Early Warning (EW)
4.9 Error-Detecting Code (EDC)
4.10 End-Of-Tape marker (EOT)
4.11 Entity
4.12 Error-Correcting Code (ECC)
4.13 flux transition position
4.14 flux transition spacing
4.15 Logical Block
4.16 logical track
4.17 magnetic tape
4.18 Master Standard Reference Tape
4.19 object
4.20 physical block
4.21 physical recording density
4.22 physical track
4.23 Record
4.24 Reference Edge
4.25 Reference Field
4.26 Secondary Standard Reference Tape
4.27 Standard Reference Amplitude (SRA)
4.28 Standard Reference Current
4.29 Test Recording Current
4.30 Typical Field
5 Conventions and notations
5.1 Representation of numbers
5.2 Names
5.3 Acronyms
6 Environment and safety
6.1 Cartridge and tape testing environment
6.2 Cartridge operating environment
6.3 Cartridge storage environment
6.4 Safety requirements
6.4.1 Safeness
6.4.2 Flammability
6.5 Transportation
Section 2 - Requirements for the unrecorded tape
7 Mechanical and electrical requirements
7.1 Material
7.2 Tape length
7.3 Width of tape
7.4 Total thickness of the tape
7.5 Thickness of the base material
7.6 Thickness of the magnetic coating
7.7 Thickness of the back coating
7.8 Tape discontinuity
7.9 Longitudinal curvature
7.9.1 Requirement
7.9.2 Procedure
7.10 Out-of-Plane distortions
7.11 Cupping
7.12 Roughness of the coating surfaces
7.12.1 Roughness of the back coating surface
7.12.2 Roughness of the magnetic coating surface
7.13 Coating adhesion
7.14 Layer-to-layer adhesion
7.14.1 Requirements
7.14.2 Procedure
7.15 Modulus of elasticity
7.15.1 Requirement
7.15.2 Procedure
7.16 Flexural rigidity
7.16.1 Requirement
7.16.2 Procedure
7.17 Tensile yield force
7.17.1 Procedure
7.18 Electrical resistance
7.18.1 Requirement
7.18.2 Procedure
7.19 Inhibitor tape
7.20 Abrasivity
7.20.1 Requirement
7.20.2 Procedure
7.21 Light transmittance of the tape and the leader
7.22 Coefficient of dynamic friction
7.22.1 Requirements
7.22.2 Procedure for the measurement of the friction
        between the magnetic surface and the back
        surface
7.22.3 Procedure for the measurement of the friction
        between the magnetic surface or the back surface
        and calcium titanate ceramic
8 Magnetic recording characteristics
8.1 Typical Field
8.2 Signal amplitude
8.3 Resolution
8.4 Overwrite
8.4.1 Requirement
8.5 Peak shift
8.5.1 Requirement
8.5.2 Procedure
9 Tape quality
9.1 Missing pulses
9.1.1 Requirement
9.2 Missing pulse zone
9.2.1 Requirement
9.3 Tape durability
Section 3 - Mechanical specifications of the tape
            cartridge
10 General
10.1 Bottom side and right side
10.2 Back side and left side
10.3 Tape reel
10.4 Tape leader
10.5 Front side
10.6 Operation of the cartridge
10.7 Tape winding
10.8 Moment of inertia
10.9 Material
Section 4 - Requirements for an interchanged tape
11 Method of recording
11.1 Physical recording density
11.2 Bit cell length
11.2.1 Average bit cell length
11.2.2 Long-term average bit cell length
11.2.3 Short-term average bit cell length
11.3 Flux transition spacing
11.4 Read signal amplitude
11.5 Azimuth
11.6 Channel skew
12 Tape format
12.1 Reference Edge
12.2 Direction of recording
12.3 Tape layout
12.4 Calibration and Directory Area
12.4.1 Scratch Area
12.4.2 Guard Area G1
12.4.3 Calibration Tracks Area
12.4.4 Guard Area G2
12.4.5 Directory Area
12.4.6 Guard Area G3
12.5 Data Area
12.5.1 Physical tracks
12.5.2 Width of the physical tracks
12.5.3 Logical tracks
12.5.4 Locations of the physical tracks
12.5.5 Layout of tracks in the Data Area
13 Data format
13.1 Data Bytes
13.2 Logical Blocks
13.3 Data Blocks
13.4 Types of Logical Blocks
13.5 Entities
13.6 Logical Block format
13.6.1 Preamble
13.6.2 Sync
13.6.3 Data Field
13.6.4 Control Field 1 (CF1)
13.6.5 Control Field 2 (CF2)
13.6.6 CRC
13.6.7 Postamble
14 Use of Logical Blocks
14.1 Data Blocks
14.2 Tape Mark Blocks
14.3 Filler Blocks
14.4 End of Track Blocks (EOTR)
14.5 End of Data Blocks (EOD)
14.6 ECC Blocks
15 Format of Entities
16 Error handling
Annexes
A Measurement of light transmittance
B CRC generation
C ECC generation
D Format of Control Field 1
E Format of Control Field 2
F Recommendations for transportation
G Inhibitor tape
H Recommendations on tape durability
J Handling guidelines