ISO/IEC 23651:2003
(Main)Information technology — 8 mm wide magnetic tape cartridge for information interchange — Helical scan recording — AIT-3 format
Information technology — 8 mm wide magnetic tape cartridge for information interchange — Helical scan recording — AIT-3 format
ISO/IEC 23651:2003 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. 3 (AIT-3 format) - thereby allowing data interchange between drives by means of such magnetic tape cartridges. ISO/IEC 23651:2003 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 de bande magnétique de 8 mm de large pour échange d'informations — Enregistrement par balayage en spirale — Format AIT-3
General Information
Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 23651
First edition
2003-08-01
Information technology — 8 mm wide
magnetic tape cartridge for information
interchange — Helical scan recording —
AIT-3 format
Technologies de l'information — Cartouche de bande magnétique de
8 mm de large pour échange d'informations — Enregistrement par
balayage en spirale — Format AIT-3
Reference number
ISO/IEC 23651:2003(E)
©
ISO/IEC 2003
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ISO/IEC 23651:2003(E)
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ISO/IEC 23651:2003(E)
Contents
Section 1 - Genera l 1
1Scope 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 3
4.13 Codeword 3
4.14 Early Warning Point (EWP) 3
4.15 End of Data (EOD) 3
4.16 Entity 3
4.17 Error Correcting Code (ECC) 3
4.18 flux transition position 3
4.19 flux transition spacing 3
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 Partition Boundary 3
4.27 Physical Beginning of Tape (PBOT) 3
4.28 Physical End of Tape (PEOT) 4
4.29 physical recording density 4
4.30 pre-recording condition 4
4.31 processing 4
4.32 processed data 4
4.33 Processed Record 4
4.34 record 4
4.35 Reference Field 4
4.36 Remote Memory In Cartridge (RMIC) 4
4.37 Secondary Standard Amplitude Calibration Tape 4
4.38 Secondary Standard Reference Tape 4
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ISO/IEC 23651:2003(E)
4.39 Separator Mark 4
4.40 Standard Reference Amplitude (SRA) 4
4.41 Standard Reference Current 4
4.42 Tape Reference Edge 4
4.43 Test Recording Current 4
4.44 track 5
4.45 Typical Field 5
4.46 unprocessed data 5
4.47 Unprocessed Record 5
5 Conventions and Notations 5
5.1 Representation of numbers 5
5.2 Names 5
6 Acronyms 5
7 Environment and safety 6
7.1 Test environment 6
7.2 Operating environment 6
7.3 Storage environment 6
7.4 Transportation 6
7.5 Safety 6
7.6 Flammability 6
Section 2 - Requirements for the case 6
8 Dimensional and mechanical characteristics of the case 6
8.1 General 6
8.2 Overall dimension 7
8.3 Holding areas 7
8.4 Cartridge insertion 8
8.5 Window 8
8.6 Loading grips 9
8.7 Label areas 9
8.8 Datum areas and Datum holes 9
8.9 Support areas 10
8.10 Recognition holes 10
8.11 Write-inhibit hole 11
8.12 Pre-positioning surfaces 12
8.13 Cartridge lid 12
8.14 Cartridge reel lock 13
8.15 Reel access holes 14
8.16 Interface between the reels and the drive spindles 14
8.17 Light path 15
8.18 Position of the tape in the case 16
8.19 Tape path zone 16
8.20 Tape access cavity 16
8.21 Tape access cavity clearance 17
8.22 Requirements for the RMIC 17
8.23 Recognition recesses 18
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
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ISO/IEC 23651:2003(E)
9.2.1 Length of magnetic tape 38
9.2.2 Length of leader and trailer tapes 38
9.2.3 Length of the splicing tapes 38
9.3 Tape width 38
9.3.1 Width of 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 tape 39
9.5.3 Thickness of the splicing tape 39
9.6 Longitudinal curvature 39
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
9.15 Recognition stripe 41
10 Magnetic recording characteristics 42
10.1 Typical Field 42
10.2 Signal Amplitude 42
10.3 Resolution 43
10.4 Overwrite 43
10.5 Ease of erasure 43
10.6 Tape quality 43
10.6.1 Missing pulses 43
10.6.2 Missing pulse zone 43
10.7 Signal-to-Noise Ratio (SNR) characteristic 43
Section 4 - Requirements for an interchanged tape 44
11 Format 44
11.1 General 44
11.2 Basic Groups 44
11.2.1 Entity 45
11.2.2 Group Information Table 45
11.2.3 Block Access Table (BAT) 48
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 53
11.4.2 Recording of the ID Information in the Data Block Headers 56
12 Method of recording 61
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
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ISO/IEC 23651:2003(E)
12.5 Bit shift 62
12.6 Read signal amplitude 62
12.7 Maximum recorded levels 62
13 Track geometry 62
13.1 Track configuration 62
13.2 Average track pitch 63
13.3 Variations of the track pitch 63
13.4 Track width 63
13.5 Track angle 63
13.6 Track edge straightness 63
13.7 Track length 63
13.8 Azimuth angles 63
14 Recorded patterns 64
14.1 Recorded Data Block 64
15 Format of tracks 64
15.1 Track structure 64
15.2 Positioning accuracy 64
15.3 Tracking scheme 64
15.4 Generation of Margin Blocks 65
16 Layout of the tape 66
16.1 Device Area 66
16.2 Reference Area 67
16.3 Position Tolerance Band No. 1 67
16.4 System Area 67
16.4.1 System Preamble 67
16.4.2 System Log 67
16.4.3 System Postamble 72
16.4.4 Position Tolerance Band No. 2 72
16.4.5 Vendor Group Preamble 72
16.5 Data Area 72
16.5.1 Vendor Group 72
16.5.2 Recorded Data Group 72
16.5.3 ECC3 73
16.5.4 Multiple Recorded Instances 74
16.5.5 Repeated Frames 74
16.5.6 Appending and overwriting 75
16.6 EOD Area 76
16.7 Optional Device Area 76
16.8 Logical End Of Tape (LEOT) 77
16.9 Logical Beginning of Tape (LBOT) 77
16.10 Early Warning Point - EWP 77
16.11 Empty Partition 77
16.12 Initialization 77
17 Housekeeping Frames 78
17.1 Amble Frames 78
17.2 System Amble Frames 78
18 AIT Remote Memory In Cartridge (AIT RMIC) 78
18.1 General 78
18.2 Content of the AIT RMIC 78
18.2.1 Manufacturer's Information Section 79
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ISO/IEC 23651:2003(E)
18.2.2 Communication Information Section 82
18.2.3 Mechanism Error Log Information Section 82
18.2.4 Memory Management Information Section 83
18.2.5 Volume Information Section 84
18.2.6 Volume Use History Information Section 85
18.3 Memory Heap Management 85
18.3.1 Cell 85
18.3.2 Cell Header 85
18.3.3 Partition Information Cell 87
18.3.4 Physical Tape Directory Information Cell 87
18.3.5 User Volume Information Cell 88
18.3.6 User Partition Information Cell 88
18.3.7 Application Information Cell 89
18.3.8 Date and Time Stamp Information Cell 90
18.3.9 Media Identification Information Cell 91
18.3.10 Tape Alert Information Cell 91
18.4 Electrical interface 92
18.5 Environment 92
18.5.1 Electromagnetic Compatibility 92
18.5.2 Magnetic fields 92
18.5.3 X-rays 92
18.6 Operating Field 92
18.7 Message from AIT RMIC reader-writer to AIT RMIC 92
18.8 Message from AIT RMIC to AIT RMIC reader-writer 93
18.8.1 Load modulation 94
18.9 EDC 95
18.10 AIT RMIC states 95
18.11 Command and Response 96
18.11.1 Attention Command and Response 97
18.11.2 Attention Command and Response Type 1 97
18.11.3 Attention Command and Response Type 2 97
18.11.4 Read Command and Response 98
18.11.5 Write Command and Response 98
18.11.6 Status Command and Response 98
18.11.7 Reset Command and Response 99
18.12 Dialogue 99
18.12.1 Read data from AIT RMIC 99
18.12.2 WritedatatoAIT RMIC 100
18.12.3 Read and Write with Session ID 101
Annexes
A (normative) - Measurement of light transmittance 105
B (normative) - Measurement of Signal-to-Noise Ratio 108
C (normative) - Method for determining the nominal and the maximum allowable recorded levels
(pre-recording condition) 109
D (normative) - Representation of 16-bit words by 18-Channel bits patterns 110
E (normative) - Measurement of bit shift 111
F (normative) - Method of measuring the straightness of track edges 113
G (normative) - ECC calculation 114
H (informative) - Recommendations for transportation 117
J (informative) - Read-After-Write 118
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ISO/IEC 23651:2003(E)
K (informative) - Basic Group No. 0 119
L (informative) - Chip for the AIT-3 format 120
M (informative) - Generation of EDC bytes for the Error Detecting Code for G2 Sub-Groups 121
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ISO/IEC 23651:2003(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the
specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the
development of International Standards through technical committees established by the respective organization to deal with
particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other
international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In
the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by
the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires
approval by at least 75 % of the national bodies casting a vote.
ISO/IEC 23651 was prepared by ECMA (as ECMA-329) and was adopted, under a special “fast-track procedure”, by Joint
Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by national bodies of ISO and IEC.
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INTERNATIONAL STANDARD ISO/IEC 23651:2003(E)
Information technology — 8 mm wide magnetic tape cartridge for information
interchange — Helical scan recording — AIT-3 format
Section 1 - General
1Scope
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. 3 (AIT-3 format) -
thereby allowing data interchange between drives by means of such magnetic tape cartridges.
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.
2 Conformance
2.1 Magnetic tape cartridge
A tape cartridge shall be in conformance with this International Standard if it meets all the mandatory requirements specified
herein. The tape requirements shall be satisfied throughout the extent of the tape.
2.2 Generating drive
A drive generating a magnetic tape cartridge for interchange shall be in conformance with this International Standard if all
recordings on the tape meet the mandatory requirements of this International Standard, and if either one or both methods of
appending and overwriting are implemented. In addition, such a drive shall be able to record the System Log in the AIT
Remote Memory In Cartridge (AIT RMIC).
A claim of conformance shall state which of the following optional features are implemented and which are not
− the performing of a Read-After-Write check and the recording of any necessary repeated frames;
− the generation of ECC3 Frames.
In addition a claim of conformance shall state
− whether or not one, or more, registered algorithm(s) are implemented within the system and are able to compress data
received from the host prior to collecting the data into Basic Groups, and
− the registered identification number(s) of the implemented compression algorithm(s).
2.3 Receiving drive
A drive receiving a magnetic tape cartridge for interchange shall be in conformance with this International Standard if it is able
to handle any recording made on the tape according to this International Standard. In particular it shall
− be able to read the System Log recorded in the AIT RMIC;
− be able to recognise repeated frames, and to make available to the host, data and Separator Marks from only one of these
frames;
− be able to recognise multiple representations of the same Basic Group, and to make available to the host, data and
Separator Marks from only one of these representations;
− be able to recognise an ECC3 frame, and ignore it if the system is not capable of using ECC3 check bytes in a process of
error correction;
− be able to recognise processed data within an Entity, identify the algorithm used, and make its registered identification
number available to the host;
− be able to make processed data available to the host.
In addition a claim of conformance shall state
− whether or not the system is capable of using ECC3 check bytes in a process of error correction;
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ISO/IEC 23651:2003(E)
− whether or not one or more de-compression algorithm(s) are implemented within the system, and are able to be applied to
compressed data prior to making such data available to the host;
− the registered identification number(s) of the compression algorithm(s) for which a complementary de-compression
algorithm is implemented.
3 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the
edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)
applies.
ISO 527 (all parts) Plastics — Determination of tensile properties
ISO 1302:2002 Geometrical Product Specifications (GPS) — Indication of surface texture in technical product
documentation
ISO/IEC 11576:1994 Information technology — Procedure for the registration of algorithms for the lossless compression
of data
4 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
4.1 Absolute Frame Number (AFN)
A sequence number encoded in a Frame.
4.2 a.c. erase
A process of erasure using magnetic fields of decaying intensity.
4.3 Access
A read or write pass over a partition.
4.4 algorithm
A set of rules for transforming the logical representation of data.
4.5 Area ID
An identifier defining the area of the tape and specifying the types of Frame written.
4.6 Automatic Track Finding (ATF)
The method by which tracking is achieved.
4.7 Average Signal Amplitude
The average peak-to-peak value of the output signal from the read head at the fundamental frequency of the specified physical
recording density over a minimum of 20,0 mm of track, exclusive of missing pulses.
4.8 azimuth
The angular deviation made by the mean flux transition line with a line normal to the centreline of the recorded track.
4.9 back surface
The surface of the tape opposite to the magnetic coating which is used to record data.
4.10 byte
An ordered set of bits acted upon as a unit.
4.11 cartridge
A case containing magnetic tape stored on twin hubs.
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ISO/IEC 23651:2003(E)
4.12 Channel bit
The elements by which, after modulation, the binary values ZERO and ONE are represented on tape by different residual
magnetism.
4.13 Codeword
A word generated by a compression algorithm. The number of bits in a Codeword is variable, and is not specified by this
International Standard.
4.14 Early Warning Point (EWP)
A point along the length of the tape at which warning is given of the approach, in the forward direction of tape motion, of the
Partition Boundary or of the Physical End of Tape.
4.15 End of Data (EOD)
The point on the tape at the end of the group which contains the last user data.
4.16 Entity
A unit of recorded data, comprising an Entity Header and a Record sequence.
4.17 Error Correcting Code (ECC)
A mathematical computation yielding check bytes used for the detection and correction of errors.
4.18 flux transition position
That point which exhibits maximum free-space flux density normal to the tape surface.
4.19 flux transition spacing
The distance along a track between successive flux transitions.
4.20 Frame
A pair of adjacent tracks with azimuths of opposite polarity, in which the track with the positive azimuth precedes that with the
negative azimuth.
4.21 Housekeeping Frame
A Frame which contains no user data and which is identified as such by the setting of the Data Fields therein.
4.22 Logical Beginning of Tape (LBOT)
The point along the length of the tape where a recording of data for interchange commences.
4.23 magnetic tape
A tape which will accept and retain the magnetic signals intended for input, output and storage purposes on computers and
associated equipment.
4.24 Master Standard Amplitude Calibration Tape
A pre-recorded tape on which the standard signal amplitudes have been recorded in the tracks of positive and negative azimuth
recorded at a track pitch of 5,5 µm, on an a.c. erased tape.
Note 1 - The tape includes recording at 1 718,2 ftpmm and 3 436,4 ftpmm.
Note 2 - The Master Standard Amplitude Calibration Tape has been established by Sony Corporation.
4.25 Master Standard Reference Tape
A tape selected as the standard for the Reference Recording Field, Signal Amplitude, Resolution, Overwrite and Signal-to-
Noise ratio.
Note - The Master Standard Reference Tape has been established by Sony Corporation.
4.26 Partition Boundary
The point along the length of a magnetic tape at which a Partition ends and the next Partition commences.
4.27 Physical Beginning of Tape (PBOT)
The point where the leader tape is joined to the magnetic tape.
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ISO/IEC 23651:2003(E)
4.28 Physical End of Tape (PEOT)
The point where the trailer tape is joined to the magnetic tape.
4.29 physical recording density
The number of recorded flux transitions per unit length of track, expressed in flux transitions per millimetre (ftpmm).
4.30 pre-recording condition
The recording levels above which a tape intended for interchange shall not previously have been recorded.
4.31 processing
The use of an algorithm to transform host data into Codewords.
4.32 processed data
A sequence of Codewords which results from the application of processing to data.
4.33 Processed Record
A sequence of Codewords which results from the application of processing to an Unprocessed Record.
4.34 record
Related data treated as a unit of information.
4.35 Reference Field
The Typical Field of the Master Standard Reference Tape.
4.36 Remote Memory In Cartridge (RMIC)
A chip within the case containing information about the cartridge and its recordings that is accessed by radio frequency
communication.
4.37 Secondary Standard Amplitude Calibration Tape
A tape pre-recorded as specified for the Master Standard Amplitude Calibration Tape the outputs of which are related to those
of the Master Standard Amplitude Calibration Tape by calibration factors.
Note - Secondary Standard Amplitude Calibration Tapes can be ordered under Part No. SSCT-AIT-3 from Sony Corporation, RME Company, Data Media
Marketing Div. 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141, Japan. In principle such Secondary Standard Amplitude Calibration Tapes will be available
for a period of 10 years from the publication of the first Edition of this International Standard. However, by agreement between ECMA and Sony Corporation,
this period can be shortened or extended to take into account the demand for such Secondary Standard Amplitude Calibration Tapes.
4.38 Secondary Standard Reference Tape
A tape the outputs of which are related to those of the Master Standard Reference Tape by calibration factors.
Note - Secondary Standard Reference Tapes can be ordered under Part No. SSRT-AIT-3 from Sony Corporation, RME Company, Data Media Marketing Div.,
6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141, Japan. In principle such Secondary Standard Reference Tapes will be available for a period of 10 yearsfrom
the publication of the first Edition of this International Standard. However, by agreement between ECMA and Sony Corporation, this period can be shortened
or extended to take into account the demand for such Secondary Standard Reference Tapes.
It is intended that these be used for calibrating tertiary reference tapes for use in routine calibration.
4.39 Separator Mark
A record containing no user data, which is used to separate data.
4.40 Standard Reference Amplitude (SRA)
The Average Signal Amplitude from the tracks of positive azimuth of the Master Standard Amplitude Calibration Tape at a
specified physical recording density.
4.41 Standard Reference Current
The current that produces the Reference Field.
4.42 Tape Reference Edge
The bottom edge of the tape when viewing the recording side of the tape, with the PEOT to the observer's right.
4.43 Test Recording Current
The current used to record an SRA. It is 1,5 times the Standard Reference Current.
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ISO/IEC 23651:2003(E)
4.44 track
A diagonally positioned area on the tape along which a series of magnetic signals may be recorded.
4.45 Typical Field
In the plot of Average Signal Amplitude against the recording field at the physical recording density of 3 436,4 ftpmm, the
minimum field that causes an Average Signal Amplitude equal to 90 % of the maximum Average Signal Amplitude.
4.46 unprocessed data
Data which has not been subjected to processing.
4.47 Unprocessed Record
A record of unprocessed data, comprising an integral number of bytes.
5 Conventions and Notations
5.1 Representation of numbers
A measured value is rounded off to the least significant digit of the corresponding specified value. This implies that, for
example, a specified value of 1,26 with a positive tolerance of +0,01 and a negative tolerance of -0,02 allows a range of
measured values from 1,235 to 1,275.
Letters and digits in parentheses represent numbers in hexadecimal notation.
Letters and digits in square parentheses represent numbers in BCD notation.
The setting of a bit is denoted by ZERO or ONE.
Bit patterns and numbers in binary notation are represented by strings of digits 0 and 1. Within such strings, x may be used to
indicate that the setting of a bit is not specified within the string.
Bit patterns and numbers in binary notation are shown with the most significant bit to the left and the least significant bit to the
right.
The most significant bit of an 8-bit byte is denoted by b and the least significant by b .
8 1
5.2 Names
The names of basic elements, e.g. specific fields, are given with a capital initial letter.
6 Acronyms
AEWP After Early Warning Point
AFN Absolute Frame Number
ATF Automatic Tracking Finding
BAT Block Access Table
BCD Binary Coded Decimal
ECC Error Correcting Code
EOD End of Data
EWP Early Warning Point
GIT Group Information Table
LBOT Logical Beginning of Tape
LEOT Logical End of Tape
LSB Least Significant Byte
LF-ID Logical Frame Identifier
MSB Most Significant Byte
MSRT Master Standard Reference Tape
PBOT Physical Beginning of Tape
PEOT Physical End of Tape
RAW Read-After-Write
RMIC Remote Memory In Cartridge
SNR Signal-to-Noise Ratio
WORM Write Once Read Many
msb Most significant bit
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ISO/IEC 23651:2003(E)
7 Environment and safety
7.1 Test environment
Tests and measurements made on the tape cartridge to check the requirements of this International Standard shall be carried
out in the following ambient conditions of the air immediately surrounding the drive.
temperature : 23 °C ± 2 °C
relative humidity : 40 % to 60 %
conditioning period before testing : 24 h min.
7.2 Operating environment
Cartridges used for data interchange shall be capable of operating under the following conditions, as measured within 10 mm
of the tape exit from the drum of the generating or receiving drive:
temperature : 5 °Cto 45 °C
relative humidity : 20 % to 80 %
wet bulb temperature : 26 °Cmax.
There shall be no deposit of moisture on or in the cartridge.
The above conditions include any temperature rise that may occur while operating the drive.
Conditioning before operating:
If a cartridge has been exposed during storage and/or transportation to a condition outside the above values, before use the
cartridge shall be conditioned in the operating environment for a time at least equal to the period during which it has been out
of the operating environment, up to a maximum of 24 h.
Note - Rapid variations of temperature should be avoided.
7.3 Storage environment
The following conditions shall be observed during storage
temperature : 5 °C to 32 °C
relative humidity : 20 % to 60 %
The stray magnetic field at any point on the tape shall not exceed 4000 A/m. There shall be no deposit of moisture on or in the
cartridge.
7.4 Transportation
Recommended limits for the environment to which a cartridge may be subjected during transportation, and the precautions to
be taken to minimise the possibility of damage, are provided in annex H.
7.5 Safety
The cartridge and its components shall satisfy the requirements of Standard ECMA-287. The cartridge and its components
shall not constitute any safety or health hazard when used in the intended manner, or through any foreseeable misuse in an
information processing system.
7.6 Flammability
The cartridge and its components shall be made from materials, which if ignited from a match flame, do not continue to burn
in a still carbon dioxide atmosphere.
Section 2 - Requirements for the case
8 Dimensional and mechanical characteristics of the case
8.1 General
Dimensional characteristics are specified for those parameters deemed to be mandatory for interchange and compatible use of
the cartridge. Where there is freedom of design, only the functional characteristics of the elements described are indicated. In
the figures a typical implementation is represented in third angle projection.
Figure 1 is a perspective view of the cartridge seen from the top.
Figure 2 is a perspective view of the cartridge seen from the bottom.
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ISO/IEC 23651:2003(E)
Figure 3 is a perspective view of Reference Planes X, Y and Z.
Figure 4 shows the front side with the lid closed.
Figure 5 shows the left side with the lid closed.
Figure 6 shows the top side with the lid closed.
Figure 7 shows the right side with the lid closed.
Figure 8 shows the rear side with the lid closed.
Figure 9 shows the bottom side, Datum and Support areas.
Figure 10 shows the bottom side with the lid removed.
Figure 11 shows an enlarged view of the Datum and Recognition holes.
Figure 12 shows the cross-sections through the light path holes, the Recognition holes and the Write-inhibit hole.
Figure 13 shows details of the lid when closed, rotating and open.
Figure 14 shows the details of the lid release insertion channel.
Figure 15 shows the lid lock release requirements.
Figure 16 shows the reel lock release requirements.
Figure 17 shows the reel unlock force direction.
Figure 18 shows the lid release force direction.
Figure 19 shows the lid opening force direction.
Figure 20 shows the light path and light window.
Figure 21 sh
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