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INCITS/ISO/IEC 15780 : 1998 : R2005
Superseded
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INFORMATION TECHNOLOGY - 8 MM WIDE MAGNETIC TAPE CARTRIDGE - HELICAL SCAN RECORDING - AIT-1 FORMAT
Hardcopy , PDF
24-04-2024
English
01-01-2005
Section 1 - General
1 Scope
2 Conformance
2.1 Magnetic tape cartridge
2.2 Generating drive
2.3 Receiving drive
3 Normative references
4 Definitions
4.1 Absolute Frame Number (AFN)
4.2 a.c. erase
4.3 Access
4.4 algorithm
4.5 Area ID
4.6 Automatic Track Finding (ATF)
4.7 Average Signal Amplitude
4.8 azimuth
4.9 back surface
4.10 byte
4.11 cartridge
4.12 Channel bit
4.13 Codeword
4.14 Early Warning Point (EWP)
4.15 End of Data (EOD)
4.16 Entity
4.17 Error Correcting Code (ECC)
4.18 flux transition position
4.19 flux transition spacing
4.20 Frame
4.21 Housekeeping Frame
4.22 Logical Beginning of Tape (LBOT)
4.23 magnetic tape
4.24 Master Standard Amplitude Calibration Tape
4.25 Master Standard Reference Tape
4.26 Memory In Cartridge (MIC)
4.27 Partition Boundary
4.28 Physical Beginning of Tape (PBOT)
4.29 Physical End of Tape (PEOT)
4.30 physical recording density
4.31 pre-recording condition
4.32 processing
4.33 processed data
4.34 Processed Record
4.35 record
4.36 Reference Field
4.37 reprocessing
4.38 Secondary Standard Amplitude Calibration Tape
4.39 Secondary Standard Reference Tape
4.40 Separator Mark
4.41 Standard Reference Amplitude (SRA)
4.42 Tape Reference Edge
4.43 Typical Field
4.44 Standard Reference Current
4.45 Test Recording Current
4.46 track
4.47 unprocessed data
4.48 Unprocessed Record
5 Conventions and Notations
5.1 Representation of numbers
5.2 Names
6 Acronyms
7 Environment and safety
7.1 Test environment
7.2 Operating environment
7.3 Storage environment
7.4 Transportation
7.5 Safety
7.6 Flammability
8 Dimensional and mechanical characteristics of the case
8.1 General
8.2 Overall dimension
8.3 Holding areas
8.4 Cartridge insertion
8.5 Window
8.6 Loading grips
8.7 Label areas
8.8 Datum areas and Datum holes
8.9 Support areas
8.10 Recognition holes
8.11 Write-inhibit hole
8.12 Pre-positioning surfaces
8.13 Cartridge lid
8.14 Cartridge reel lock
8.15 Reel access holes
8.16 Interface between the reels and the drive spindles
8.17 Light path
8.18 Position of the tape in the case
8.19 Tape path zone
8.20 Tape access cavity
8.21 Tape access cavity clearance requirements
8.22 Requirements for the MIC
Section 3 - Requirements for the unrecorded tape
9 Mechanical, physical and dimensional characteristics of
the tape
9.1 Materials
9.2 Tape length
9.3 Tape width
9.4 Discontinuities
9.5 Tape thickness
9.6 Longitudinal curvature
9.7 Cupping
9.8 Coating adhesion
9.9 Layer-to-layer adhesion
9.10 Tensile strength
9.11 Residual elongation
9.12 Electrical resistance of the recording surface
9.13 Tape winding
9.14 Light transmittance of the tape
10 Magnetic recording characteristics
10.1 Typical Field
10.2 Signal Amplitude
10.3 Resolution
10.4 Overwrite
10.5 Ease of erasure
10.6 Tape quality
10.7 Signal-to-Noise Ratio (SNR) characteristic
Section 4 - Requirements for an interchanged tape
11 Format
11.1 General
11.2 Basic Groups
11.3 Sub-Groups
11.4 Data Block
12 Method of recording
12.1 Physical recording density
12.2 Long-term average bit cell length
12.3 Short-term average bit cell length
12.4 Rate of change
12.5 Bit shift
12.6 Read signal amplitude
12.7 Maximum recorded levels
13 Track geometry
13.1 Track configuration
13.2 Average track pitch
13.3 Variations of the track pitch
13.4 Track width
13.5 Track angle
13.6 Track edge straightness
13.7 Track length
13.8 Azimuth angles
14 Recorded patterns
14.1 Recorded Data Block
14.2 Margin blocks
15 Format of a track
15.1 Track capacity
15.2 Positioning accuracy
15.3 Tracking scheme
16 Layout of a Single Data Space tape
16.1 Device Area
16.2 Reference Area
16.3 Position Tolerance Band No. 1
16.4 System Area
16.5 Data Area
16.6 EOD Area
16.7 Optional Device Area
16.8 Early Warning Point - EWP
16.9 Initialization
17 Layout of partitioned tape
17.1 Overall magnetic tape layout
17.2 LBOT
17.3 Empty Partition
17.4 Initialization of partitioned tapes
18 Housekeeping Frames
18.1 Amble Frames
18.2 System Amble Frames
Annexes
A - Measurement of light transmittance
B - Measurement of Signal-to-Noise Ratio
C - Method for determining the nominal and the maximum
allowable recorded levels
D - Representation of 8-bit bytes by 10-bit patterns
E - Measurement of bit shift
F - Method of measuring the straightness of track edges
G - ECC calculation
H - Recommendations for transportation
J - Read-After-Write
K - Example of the content of a Basic Group No. 0
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