ECMA 320 : 1ED 2001

1 Scope
2 Conformance
   2.1 Magnetic tape cartridges
   2.2 Generating systems
   2.3 Receiving systems
3 References
4 Definitions
   4.1 back surface
   4.2 Beginning-Of-Tape marker (BOT)
   4.3 block
   4.4 byte
   4.5 cartridge
   4.6 Cyclic Redundancy Check (CRC) character
   4.7 Error-Detecting Code (EDC)
   4.8 End-Of-Tape marker (EOT)
   4.9 Entity
   4.10 Error-Correcting Code (ECC)
   4.11 Envelope
   4.12 Envelope size
   4.13 flux transition position
   4.14 flux transition spacing
   4.15 logical track
   4.16 magnetic tape
   4.17 Master Standard Reference Tape
   4.18 object
   4.19 page
   4.20 recording density
   4.21 physical track
   4.22 Record
   4.23 Reference Edge
   4.24 Reference Field
   4.25 Secondary Standard Reference Tape
   4.26 Standard Reference Amplitude (SRA)
   4.27 Standard Reference Current
   4.28 Test Recording Current
   4.29 Typical Field
5 Conventions and notations
   5.1 Representation of numbers
   5.2 Dimensions
   5.3 Names
   5.4 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
   6.5 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 Tape width
   7.4 Tape thickness
   7.5 Discontinuity
   7.6 Longitudinal curvature
        7.6.1 Requirements
        7.6.2 Procedure
   7.7 Out-of-Plane distortions
   7.8 Cupping
   7.9 Roughness of the coating surfaces
        7.9.1 Roughness of the back coating surface
        7.9.2 Roughness of the magnetic coating surface
   7.10 Coating adhesion
   7.11 Layer-to-layer adhesion
        7.11.1 Requirements
        7.11.2 Procedure
   7.12 Modulus of elasticity
        7.12.1 Requirement
        7.12.2 Procedure
   7.13 Flexural rigidity
        7.13.1 Requirement
        7.13.2 Procedure
   7.14 Tensile yield force
        7.14.1 Procedure
   7.15 Electrical resistance
        7.15.1 Requirement
        7.15.2 Procedure
   7.16 Inhibitor tape
   7.17 Light transmittance of the tape and the leader
   7.18 Abrasivity
   7.19 Coefficient of dynamic friction
        7.19.1 Requirements
        7.19.2 Procedure for the measurement of the
               friction between the magnetic surface
               and the back surface
        7.19.3 Procedure for the measurement of the
               friction between the magnetic surface or
               the back surface and calcium titanate
               ceramic
   7.20 Servo
        7.20.1 Servo Bands
        7.20.2 Servo Tracks
        7.20.3 Signal
        7.20.4 Signal-to Noise Ratio
        7.20.5 Missing servo mark
8 Magnetic recording characteristics
   8.1 Typical Field
   8.2 Signal amplitude
   8.3 Resolution
   8.4 Overwrite
        8.4.1 Requirement
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 Tape format
   11.1 Reference Edge
   11.2 Direction of recording
   11.3 Tape layout
        11.3.1 Data Area
        11.3.2 Forward Alignment and Directory Area
        11.3.3 Reverse Alignment Area at EOT
12 Data format
   12.1 Record
   12.2 Data Bytes
   12.3 Data Field
        12.3.1 Pages
        12.3.2 Pad Bytes
        12.3.3 Page layout
        12.3.4 MAP entries
        12.3.5 EDC
   12.4 Data Blocks
        12.4.1 Control Field 1 (CF1)
        12.4.2 Control Field 2 (CF2)
        12.4.3 CRC
13 Method of recording
   13.1 Physical recording density
   13.2 Channel bit cell length
        13.2.1 Average Channel bit cell length
        13.2.2 Long-term average Channel bit cell length
        13.2.3 Short-term average Channel bit cell length
   13.3 Read signal amplitude
   13.4 Channel skew
14 Block Recording Format
   14.1 Scrambler
   14.2 Modulation
        14.2.1 Modulation process
        14.2.2 Modulated Data Group
   14.3 Precoder
   14.4 Recording Data Block
        14.4.1 Preamble
        14.4.2 Sync
15 Types and Use of Blocks
   15.1 Types of Blocks
   15.2 Use of blocks
        15.2.1 Track ID Start Blocks
        15.2.2 End of Track Blocks (EOTR)
        15.2.3 End of Data of Data Blocks (EOD)
        15.2.4 ECC Blocks
        15.2.5 Track ID End Blocks
16 Format of Entities
17 Format of Envelopes
18 Error handling
Annex A - Measurement of light transmittance
Annex B - Procedure for the measurement of abrasivity
Annex C - Generation of the Data Block CRCs
Annex D - Generation of page CRCs
Annex E - ECC generation
Annex F - Allocation of Physical Tracks to Logical
          Tracks
Annex G - Recommendations for transportation
Annex H - Inhibitor tape
Annex J - Recommendations on tape durability
Annex K - Handling guidelines

States the physical and magnetic characteristics of a 12,7 mm wide, 448-track magnetic tape cartridge, to enable physical interchangeability of such cartridges between drives.