ISO/IEC INTERNATIONAL STANDARD 15780 First edition 1998-08-01 Information technology 8 mm wide magnetic tape cartridge Helical scan recording AlT-1 format Technologies de I'information Cartouche de bande magnetique de 8 mm Reference number ISO/IEC 15780:1998(E) No r y IHS under ted without license from IHS Not for Resale ISO/IEC 15780:1998(E) Contents Section 1 - General 1 1 Scope 2 Conformance 1 2.1 Magnetic tape cartridge 1 2.2 Generating drive 1 2.3 Receiving drive 1 3 Normative references 2 4 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 22 4.6 Automatic Track Finding (ATF) 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 2 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) 33 4.30 physical recording density ISO/IEC 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ermitted without license from IHS Not for Resale @ISO/IEC ISO/IEC 15780:1998 (E) 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 reprocessing 3 4.38 Secondary Standard Amplitude Calibration Tape 3 4.39 Secondary Standard Reference Tape 3 4.40 Separator Mark 3 4.41 Standard Reference Amplitude (SRA) 3 4.42 Tape Reference Edge 4 4.43 Typical Field 4 4.44 Standard Reference Current 4 4.45 Test Recording Current 4 4.46track 4 4.47 unprocessed data 4 4.48 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 5 7.1 Test environment 5 7.2 Operating environment 5 7.3 Storage environment 5 7.4 Transportation 5 7.5 Safety 5 7.6 Flammability 5 8 Dimensional and mechanical characteristics of the case 6 8.1 General 6 8.2 Overall dimension 6 8.3 Holding areas 7 8.4 Cartridge insertion 7 8.5 Window 8 8.6 Loading grips 8 8.7 Label areas 8 8.8 Datum areas and Datum holes :8 8.9 Support areas 9 8.10 Recognition holes 10 8.11 Write-inhibit hole 10 8.12 Pre-positioning surfaces 11 8.13 Cartridge lid 11 8.14 Cartridge reel lock 12 8.15 Reel access holes 13 8.16 Interface between the reels and the drive spindles 13 8.17 Light path 14 8.18 Position of the tape in the case 15 8.19 Tape path zone 15 8.20 Tape access cavity 15 8.21 Tape access cavity clearance requirements 16 8.22 Requirements for the MIC 16 8.22.1 Access holes 16 ainagazaiSandardizato ili nited withoutlicense from IHS Not fr Resale ISO/IEC 15780:1998 (E) @ISO/IEC 8.22.2 Recognition recesses 17 Section 3 - Requirements for the unrecorded tape 37 9 Mechanical, physical and dimensional characteristics of the tape 37 9.1 Materials 37 9.2 Tape length 37 9.2.1 Length of magnetic tape 37 9.2.2 Length of leader and trailer tapes 37 9.2.3 Length of the splicing tapes 37 9.3 Tape width 37 9.3.1 Width of magnetic, leader and trailer tapes 37 9.3.2 Width and position of the splicing tape 37 9.4 Discontinuities 37 9.5 Tape thickness 38 9.5.1 Thickness of the magnetic tape 38 9.5.2 Thickness of leader and trailer tape 38 9.5.3 Thickness of splicing tape 38 9.6 Longitudinal curvature 38 9.7 Cupping 38 9.8 Coating adhesion 38 9.9 Layer-to-layer adhesion 39 9.10 Tensile strength 39 9.10.1 Breaking