Information technology -- 8 mm wide magnetic tape cartridge for information interchange -- Helical scan recording AIT-1 with MIC format

This International Standard specifies the physical and magnetic characteristics of an 8 mm wide magnetic tape cartridge containing a memory chip to enable physical interchange of such cartridges between drives. It also specifies the quality of the recorded signals, the recording method and the recorded format - called Advanced Intelligent Tape No. 1 with Memory In Cartridge (AIT-1 with MIC) - thereby allowing data interchange between drives by means of such magnetic tape cartridges. The System Log is recorded in the MIC. This International Standard specifies two types of cartridge depending on the thickness of the magnetic tape contained in the case. Information interchange between systems also requires, at a minimum, agreement between the interchange parties upon the interchange code(s) and the specifications of the structure and labelling of the information on the interchanged cartridge.

Technologies de l'information -- Cartouche à bande magnétique de 8 mm de large pour l'échange d'information -- Enregistrement par balayage en spirale AIT-1 avec format MIC

General Information

Status
Published
Publication Date
20-Dec-2000
Current Stage
9093 - International Standard confirmed
Start Date
21-Aug-2020
Ref Project

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Standard
ISO/IEC 18809:2000 - Information technology -- 8 mm wide magnetic tape cartridge for information interchange -- Helical scan recording AIT-1 with MIC format
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INTERNATIONAL ISO/IEC
STANDARD 18809
First edition
2000-12-15
Information technology — 8 mm wide
magnetic tape cartridge for information
interchange — Helical scan recording AIT-1
with MIC format
Technologies de l'information — Cartouche à bande magnétique de 8mm
de large pour l'échange d'information — Enregistrement par balayage en
spirale AIT-1 avec format MIC
Reference number
ISO/IEC 18809:2000(E)
ISO/IEC 2000
---------------------- Page: 1 ----------------------
ISO/IEC 18809:2000(E)
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ii © ISO/IEC 2000 – All rights reserved
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ISO/IEC 18809:2000(E)
Contents

Section 1 - General........................................................................................................................................................................1

1 Scope.................................................................................................................................................................................1

2 Conformance.....................................................................................................................................................................1

2.1 Magnetic tape cartridge.....................................................................................................................................................1

2.2 Generating drive................................................................................................................................................................1

2.3 Receiving drive .................................................................................................................................................................1

3 Normative references ........................................................................................................................................................2

4 Terms and definitions........................................................................................................................................................2

4.1 Absolute Frame Number (AFN) .......................................................................................................................................2

4.2 a.c. erase............................................................................................................................................................................2

4.3 Access ...............................................................................................................................................................................2

4.4 algorithm ...........................................................................................................................................................................2

4.5 Area ID..............................................................................................................................................................................2

4.6 Automatic Track Finding (ATF).......................................................................................................................................2

4.7 Average Signal Amplitude................................................................................................................................................2

4.8 azimuth..............................................................................................................................................................................2

4.9 back surface.......................................................................................................................................................................2

4.10 byte....................................................................................................................................................................................2

4.11 cartridge ............................................................................................................................................................................2

4.12 Channel bit ........................................................................................................................................................................2

4.13 Codeword..........................................................................................................................................................................2

4.14 Early Warning Point (EWP)..............................................................................................................................................2

4.15 End of Data (EOD)............................................................................................................................................................2

4.16 Entity.................................................................................................................................................................................2

4.17 Error Correcting Code (ECC) ...........................................................................................................................................2

4.18 flux transition position ......................................................................................................................................................2

4.19 flux transition spacing.......................................................................................................................................................2

4.20 Frame ................................................................................................................................................................................3

4.21 Housekeeping Frame.........................................................................................................................................................3

4.22 Logical Beginning of Tape (LBOT)..................................................................................................................................3

4.23 magnetic tape ....................................................................................................................................................................3

4.24 Master Standard Amplitude Calibration Tape...................................................................................................................3

4.25 Master Standard Reference Tape ......................................................................................................................................3

4.26 Memory In Cartridge (MIC) .............................................................................................................................................3

4.27 Partition Boundary ............................................................................................................................................................3

4.28 Physical Beginning of Tape (PBOT) ................................................................................................................................3

4.29 Physical End of Tape (PEOT)...........................................................................................................................................3

4.30 physical recording density.................................................................................................................................................3

4.31 pre-recording condition.....................................................................................................................................................3

4.32 processing..........................................................................................................................................................................3

4.33 processed data ...................................................................................................................................................................3

4.34 Processed Record ..............................................................................................................................................................3

4.35 record ................................................................................................................................................................................3

4.36 Reference Field .................................................................................................................................................................3

4.37 Secondary Standard Amplitude Calibration Tape.............................................................................................................3

4.38 Secondary Standard Reference Tape.................................................................................................................................3

4.39 Separator Mark..................................................................................................................................................................3

4.40 Standard Reference Amplitude (SRA)..............................................................................................................................3

4.41 Tape Reference Edge ........................................................................................................................................................4

4.42 Typical Field .....................................................................................................................................................................4

4.43 Standard Reference Current ..............................................................................................................................................4

4.44 Test Recording Current .....................................................................................................................................................4

4.45 track...................................................................................................................................................................................4

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ISO/IEC 18809:2000(E)

4.46 unprocessed data............................................................................................................................................................... 4

4.47 Unprocessed Record ......................................................................................................................................................... 4

5 Conventions and Notations............................................................................................................................................... 4

5.1 Representation of numbers ............................................................................................................................................... 4

5.2 Names ............................................................................................................................................................................... 4

6 Acronyms.......................................................................................................................................................................... 4

7 Environment and safety .................................................................................................................................................... 4

7.1 Test environment .............................................................................................................................................................. 4

7.2 Operating environment ..................................................................................................................................................... 5

7.3 Storage environment......................................................................................................................................................... 5

7.4 Transportation................................................................................................................................................................... 5

7.5 Safety................................................................................................................................................................................ 5

7.6 Flammability..................................................................................................................................................................... 5

Section 2 - Requirements for the case......................................................................................................................................... 6

8 Dimensional and mechanical characteristics of the case .................................................................................................. 6

8.1 General ............................................................................................................................................................................. 6

8.2 Overall dimension (figures 5 and 6) ................................................................................................................................. 6

8.3 Holding areas.................................................................................................................................................................... 7

8.4 Cartridge insertion ............................................................................................................................................................ 7

8.5 Window (figure 1) ............................................................................................................................................................ 8

8.6 Loading grips (figures 5 and 7)......................................................................................................................................... 8

8.7 Label areas (figures 6 and 8) ............................................................................................................................................ 8

8.8 Datum areas and Datum holes .......................................................................................................................................... 8

8.9 Support areas (figure 9) .................................................................................................................................................... 9

8.10 Recognition holes (figures 10, 11 and 12)...................................................................................................................... 10

8.11 Write-inhibit hole (figure 11) ......................................................................................................................................... 10

8.12 Pre-positioning surfaces (figures 4 and 10) .................................................................................................................... 11

8.13 Cartridge lid (figures 6, 13 and 15)................................................................................................................................. 11

8.14 Cartridge reel lock (figures 10 and 16)........................................................................................................................... 12

8.15 Reel access holes (figure 10) .......................................................................................................................................... 13

8.16 Interface between the reels and the drive spindles.......................................................................................................... 13

8.17 Light path (figures 10, 12, 20 and 21) ............................................................................................................................ 14

8.18 Position of the tape in the case (figure 21) ..................................................................................................................... 15

8.19 Tape path zone................................................................................................................................................................ 15

8.20 Tape access cavity (figure 10) ........................................................................................................................................ 16

8.21 Tape access cavity clearance (figure 24) ........................................................................................................................ 16

8.22 Requirements for the MIC (figures 25 and 26)............................................................................................................... 16

8.23 Recognition recesses (figures 8 and 10) ......................................................................................................................... 17

Section 3 - Requirements for the unrecorded tape.................................................................................................................. 38

9 Mechanical, physical and dimensional characteristics of the tape.................................................................................. 38

9.1 Materials ......................................................................................................................................................................... 38

9.2 Tape length ..................................................................................................................................................................... 38

9.2.1 Length of the magnetic tape............................................................................................................................................ 38

9.2.2 Length of the leader and trailer tapes.............................................................................................................................. 38

9.2.3 Length of the splicing tapes............................................................................................................................................ 38

9.3 Tape width ...................................................................................................................................................................... 38

9.3.1 Width of the magnetic, leader and trailer tapes .............................................................................................................. 38

9.3.2 Width and position of the splicing tape .......................................................................................................................... 38

9.4 Discontinuities................................................................................................................................................................ 39

9.5 Tape thickness ................................................................................................................................................................ 39

9.5.1 Thickness of the magnetic tape....................................................................................................................................... 39

9.5.2 Thickness of the leader and trailer tapes......................................................................................................................... 39

9.5.3 Thickness of the splicing tape......................................................................................................................................... 39

9.6 Longitudinal curvature.................................................................................................................................................... 39

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ISO/IEC 18809:2000(E)

9.7 Cupping...........................................................................................................................................................................39

9.8 Coating adhesion.............................................................................................................................................................39

9.9 Layer-to-layer adhesion...................................................................................................................................................40

9.10 Tensile strength...............................................................................................................................................................40

9.10.1 Breaking strength ............................................................................................................................................................40

9.10.2 Yield strength..................................................................................................................................................................40

9.11 Residual elongation.........................................................................................................................................................40

9.12 Electrical resistance of the recording surface..................................................................................................................40

9.13 Tape winding...................................................................................................................................................................41

9.14 Light transmittance of the tape........................................................................................................................................41

10 Magnetic recording characteristics..................................................................................................................................41

10.1 Typical Field ...................................................................................................................................................................42

10.2 Signal Amplitude ............................................................................................................................................................42

10.3 Resolution .......................................................................................................................................................................42

10.4 Overwrite ........................................................................................................................................................................42

10.5 Ease of erasure ................................................................................................................................................................42

10.6 Tape quality.....................................................................................................................................................................42

10.6.1 Missing pulses.................................................................................................................................................................42

10.6.2 Missing pulse zone..........................................................................................................................................................43

10.7 Signal-to-Noise Ratio (SNR) characteristic ....................................................................................................................43

Section 4 - Requirements for an interchanged tape.................................................................................................................43

11 Format .............................................................................................................................................................................43

11.1 General............................................................................................................................................................................43

11.2 Basic Groups ...................................................................................................................................................................43

11.2.1 Entity...............................................................................................................................................................................44

11.2.2 Group Information Table ................................................................................................................................................45

11.2.3 Block Access Table (BAT) .............................................................................................................................................47

11.3 Sub-Groups .....................................................................................................................................................................50

11.3.1 G1 Sub-Group .................................................................................................................................................................50

11.3.2 G2 Sub-Group - Randomizing ........................................................................................................................................51

11.3.3 G3 Sub-Group .................................................................................................................................................................52

11.4 Data Block.......................................................................................................................................................................53

11.4.1 ID information.................................................................................................................................................................54

11.4.2 Recording of the ID Information in the Data Block Headers..........................................................................................56

12 Method of recording........................................................................................................................................................62

12.1 Physical recording density ..............................................................................................................................................62

12.2 Long-term average bit cell length ...................................................................................................................................62

12.3 Short-term average bit cell length ...................................................................................................................................62

12.4 Rate of change.................................................................................................................................................................62

12.5 Bit shift............................................................................................................................................................................63

12.6 Read signal amplitude.....................................................................................................................................................63

12.7 Maximum recorded levels...............................................................................................................................................63

13 Track geometry ...............................................................................................................................................................63

13.1 Track configuration.........................................................................................................................................................63

13.2 Average track pitch .........................................................................................................................................................63

13.3 Variations of the track pitch............................................................................................................................................64

13.4 Track width .....................................................................................................................................................................64

13.5 Track angle......................................................................................................................................................................64

13.6 Track edge s
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