• INCITS/ISO/IEC 13923 : 1996 : R2007

    Current The latest, up-to-date edition.

    INFORMATION TECHNOLOGY - 3,81 MM WIDE MAGNETIC TAPE CARTRIDGE FOR INFORMATION INTERCHANGE - HELICAL SCAN RECORDING - DDS-2 FORMAT USING 120 M LENGTH TAPE

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-2007

    Publisher:  Information Technology Industry Council

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    Table of Contents - (Show below) - (Hide below)

    Section 1 - General
    1 Scope
    2 Conformance
        2.1 Magnetic tape cartridge
        2.2 Generating system
        2.3 Receiving system
    3 Normative References
    4 Definitions
        4.1 Absolute Frame number (AFN)
        4.2 a.c. erase
        4.3 Access Point
        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 Data Format ID
        4.15 Early Warning Point (EWP)
        4.16 End of Data (EOD)
        4.17 Entity
        4.18 Error Correcting Code (ECC)
        4.19 flux transition position
        4.20 flux transition spacing
        4.21 Frame
        4.22 Housekeeping Frame
        4.23 Logical Beginning of Tape (LBOT)
        4.24 magnetic tape
        4.25 Master Standard Amplitude Calibration Tape
        4.26 Master Standard Reference Tape
        4.27 Optimum Recording Field
        4.28 Partition boundary
        4.29 Physical beginning of Tape (PBOT)
        4.30 Physical end of Tape (PEOT)
        4.31 physical recording density
        4.32 Pre-recording condition
        4.33 Processing
        4.34 Processed data
        4.35 Processed Record
        4.36 Processed Record Sequence
        4.37 record
        4.38 Reference Recording Field
        4.39 reprocessing
        4.40 Secondary Standard Amplitude Calibration Tape
        4.41 Secondary Standard Reference Tape
        4.42 Separator Mark
        4.43 Standard Reference Amplitude
        4.44 Tape Reference Edge
        4.45 Test Recording Current
        4.46 track
        4.47 unprocessed data
        4.48 Unprocessed Record
        4.49 Virtual End of Tape (VEOT)
    5 Environment and safety
        5.1 Testing environment
        5.2 Operating environment
        5.3 Storage environment
        5.4 Transportation
        5.5 Safety
        5.6 Flammability
    Section 2 - Requirements for the case
    6 Dimensional and mechanical characteristics of the case
        6.1 General
        6.2 Overall dimensions
        6.3 Loading grip
        6.4 Holding areas
        6.5 Notches of the lid
        6.6 Lid dimensions
        6.7 Optical detection of the beginning and end of tape
        6.8 Bottom side
        6.9 Hubs
        6.10 Attachment of leader and trailer tapes
        6.11 Interface between the hubs and the drive spindles
        6.12 Opening of the lid
        6.13 Release of the hub locking mechanism
        6.14 Label areas
        6.15 Requirement for autoloaders
    Section 3 - Requirements for the unrecorded tape
    7 Mechanical, physical and dimensional characteristics
        of the tape
        7.1 Materials
        7.2 Tape length
        7.3 Tape width
        7.4 Discontinuities
        7.5 Tape thickness
        7.6 Longitudinal curvature
        7.7 Cupping
        7.8 Coating adhesion
        7.9 Layer-to-layer adhesion
        7.10 Tensile strength
        7.11 Residual elongation
        7.12 Flexural rigidity
        7.13 Electrical resistance of coated surfaces
        7.14 Light transmittance of the tape
        7.15 Media Recognition System (MRS)
    8 Magnetic recording characteristics
        8.1 Optimum Recording Field
        8.2 Signal Amplitude
        8.3 Resolution
        8.4 Overwrite
        8.5 Ease of erasure
        8.6 Tape quality
        8.7 Signal-to-Noise Ratio (S/N) characteristic
    Section 4 - Requirements for an interchanged tape
    9 Format
        9.1 General
        9.2 Basic Groups
        9.3 Sub-Groups
        9.4 Sub-Data Area
    10 Method of recording
        10.1 Physical recording density
        10.2 Long-term average bit cell length
        10.3 Short-term average bit cell length
        10.4 Rate of change
        10.5 Bit shift
        10.6 Read signal amplitude
        10.7 Maximum recorded levels
    11 Track geometry
        11.1 Track configuration
        11.2 Averaged track pitch
        11.3 Variations of the track pitch
        11.4 Track width
        11.5 Track angle
        11.6 Track edge linearity
        11.7 Track length
        11.8 Ideal tape centreline
        11.9 Azimuth angles
    12 Recording of blocks on the tape
        12.1 Recorded Main Data Block
        12.2 Recorded Sub Data Block
        12.3 Margin Blocks, Preamble Blocks and Postamble Blocks
        12.4 Spacer Blocks
    13 Format of a track
        13.1 Track capacity
        13.2 Positioning accuracy
        13.3 Tracking scheme
    14 Layout of a Single Data Space tape
        14.1 Device Area
        14.2 Reference Area
        14.3 Position Tolerance Band No. 1
        14.4 System Area
        14.5 Data Area
        14.6 EOD Area
        14.7 Post-EOD Area
        14.8 Early-Warning Point - EWP
        14.9 Initialization
    15 Layout of partitioned tape
        15.1 Overall magnetic tape layout
        15.2 Area ID
        15.3 System Area Pack Items No. 3 and No. 4
        15.4 Empty partitions
        15.5 Initialization of partitioned tapes
    16 Housekeeping Frames
        16.1 Amble Frames
        16.2 System Log Frames
        16.3 Tape Management Frames
    Annexes
    Annex A (normative) Measurement of the light transmittance
            of the prisms
    Annex B (informative) Recognition Holes
    Annex C (informative) Means to open the lid
    Annex D (normative) Measurement of light transmittance of
            tape and leaders
    Annex E (normative) Measurement of Signal to Noise Ratio
    Annex F (normative) Method for determining the nominal and
            the maximum allowable recorded levels (pre-recording
            condition)
    Annex G (normative) Representation of &bit bytes by lo-bit
            patterns
    Annex H (normative) Measurement of bit shift
    Annex J (informative) Recommendations for transportation
    Annex K (normative) Method of measuring track edge linearity
    Annex L (informative) Read-After-Write
    Annex M (informative) Example of the content of a Basic Group
            No. 0

    Abstract - (Show below) - (Hide below)

    Describes the physical and magnetic characteristics of a 3,81 mm wide magnetic tape cartridge to enable physical interchangeability of such cartridges between drives. It also specifies the quality of the recorded signals.

    General Product Information - (Show below) - (Hide below)

    Document Type Standard
    Product Note Reconfirmed 2007
    Publisher Information Technology Industry Council
    Status Current

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO/R 527:1966 Plastics Determination of tensile properties
    IEC 60950:1999 Safety of information technology equipment
    ISO/IEC 11576:1994 Information technology Procedure for the registration of algorithms for the lossless compression of data
    ISO 1302:2002 Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation
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