ISO/IEC INTERNATIONAL STANDARD 12247 First edition 1993-12-15 Information technology - 3,81 mm wide magnetic tape cartridge for information interchange - Helical scan recording DDS format using 60 m and 90 m length tapes Technologies de I'information Cartouche de bande magnetique de 3,81 mm de large pour I'échange d'information - -Enregistrementpar balayage en spirale - Format DDS utilisant des bandes de 60 m et 90 m de long IE( Tso Reference number ISO/IEC12247:1993(E) Copyright Intermational Organization for Standardization Not for Resale ISO/IEC 12247:1993 (E) Contents Page Section 1 - General 1 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridge 1 2.2 Generating system 1 2.3 Receiving system 2 3 Normative references 2 4 Definitions 2 4.1 Absolute Frame Number (AFN) 2 4.2 Area ID 2 4.3 Automatic Track Finding (ATF) 2 4.4 Average Signal Amplitude 2 4.5 azimuth 2 4.6 back surface 2 4.7 byte 2 4.8 cartridge 2 4.9 Channel Bit 2 4.10 Data Format ID 2 4.11 Early Warning Point (EWP) 3 4.12 End of Data (EOD) 3 4.13 Error Correcting Code (ECC) 3 4.14 flux transition position 3 4.15 flux transition spacing 3 4.16 frame 3 4.17 Housekeeping Frame 3 4.18 Logical Beginning of Tape (LBOT) 3 ISO/IEC1993 All rights reserved. Unless otherwise specified, no part of this publication may. be 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 Copyright Intermational Organization for Standardization No reproduction or networking permited without license from IHS Not for Resale ISO/IEC 12247:1993 (E) 4.19 magnetic tape 3 4.20 Master Standard Amplitude Calibration Tape 3 4.21 Master Standard Reference Tape 3 4.22 Optimum Recording Field 3 4.23 partition boundary 3 4.24 Physical Beginning of Tape (PBOT) 3 4.25 Physical End of Tape (PEOT) 3 4.26 physical recording density 3 4.27 pre-recording condition 3 4.28 3 4.29 Reference Recording Field 3 4.30 Secondary Standard Amplitude Calibration Tape 3 4.31 Secondary Standard Reference Tape 4 4.32 Separator Mark 4 4.33 Standard Reference Amplitude 4 4.34 Tape Reference Edge 4 4.35 Test Recording Current 4 4.36 track 4 4.37 Virtual End of Tape (VEOT) 4 5 Environment and safety 4 5.1 Testing environment 4 5.2 Operating environment 4 5.3 Storage environment 4 5.4 Transportation 5 5.5 Safety 5 5.6 Flammability 5 Section 2 - Requirements for the case 5 6 Dimensional and mechanical characteristics of the case 5 6.1 General 5 6.2 Overall dimensions 6 6.3 Loading grip 9 6.4 Holding areas 6 6.5 Notches of the lid 6 6.6 Lid dimensions 7 6.7 Optical detection of the beginning and end of tape 7 6.8 Bottom side 8 6.8.1 Locking mechanism of the slider 8 6.8.2 Access Holes 9 6.8.3 Recognition, Sub-datums, and Write-inhibit Holes 9 6.8.4 Datum Holes 10 6.8.5 Access room for tape guides 11 6.8.6 Holes for accessing the hubs 11 6.8.7 Internai structure of the iower haif 11 6.8.8 Light path 12 6.8.9 Support Areas 13 6.8.10 Datum Areas 13 CopyrihteationalOrganizatiorStandardization ii No reproduction or networking permited without license from IHS Not for Resale ISO/IEC 12247:1993 (E) 13 6.8.11 6.9 Hubs 13 6.10 Leader and trailer attachment 14 6.11 Interface between the hubs and the drive spindles 14 6.12 Opening of the lid 14 6.13 Release of the hub locking mechanism 14 6.14 Label areas 15 Section 3 - Requirements for the unrecorded tape 26 7 Mechanical, physical and dimensional characteristics of the tape 26 7.1 Materials 26 7.2 26 Tape length 7.2.1 Length of magnetic tape 26 7.2.2 Length of leader and trailer tapes 26 7.2.3 Length of splicing tapes 26 7.3 Tape width 26 7.3.1 Width of magnetic, leader and trailer tapes 26 7.3.2 Width and position of splicing tape 26 7.4 Discontinuities 26 7.5 26 Total thickness 7.6 Longitudinal curvature 27 7.7 Cupping 27 7.8 27 Coating adhesion 7.9 Layer-to-layer adhesion 27 7.10 Tensile strength 28 7.10.1 Breaking strength 28 7.10.2 Yield strength 28 7.11 Res