ISO/IEC INTERNATIONAL STANDARD 12248 Firstedition 1993-12-15 Information technology 3,81 mm wide magnetic tape cartridge for information interchange Helical scan recording DATA/DAT-DC format using 60 m and 90 m length tapes Technologies de l'information -Cartouche de bandemagnétique de balayageen spirale-- FormatDATA/DAT-DCutilisantdesbandes de 60 m et 90 m de long IE( Tso Reference number ISO/IEC12248:1993(E) Copyright Intemational Organization for Standardization No rep Not for Resale ISO/IEC 12248:1993 (E) Contents Page 1 Scope 2 Conformance 1 2.1 Magnetic tape cartridge 1 2.2 Generating system 1 2.3 Receiving system 1 3 Normative references 1 4 Definitions 2 4.1 Absolute Frame Number (AFN) 2 4.2 algorithm 2 4.3 Area ID 2 4.4 Automatic Track Finding (ATF) 2 4.5 Average Signal Amplitude 2 4.6 azimuth 2 4.7 back surface 2 4.8 byte 2 4.9 cartridge 2 4.10 Channel Bit 2 4.11 Codeword 2 4.12 Data Format ID 2 4.13 End of Data (EOD) 2 4.14 End of Information (EOl) 2 4.15 End of Partition (EOP) 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 group 2 4.22 Logical Beginning of Tape (LBOT) 2 ISO/IEC1993 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 ii ed without license from IHS Not for Resale ISO/IEC 12248:1993 (E) 4.23 Logical End of Tape (LEOT) 2 4.24 magnetic tape 3 4.25 master reference 3 4.26 Master Standard Amplitude Calibration Tape 3 4.27 Master Standard Reference Tape 3 4.28 Optimum Recording Field 3 4.29 partition 3 4.30 3 partition reference 4.31 Physical Beginning of Tape (PBOT) 3 4.32 Physical End of Tape (PEOT) 3 4.33 physical recording density 3 4.34 pre-recording condition 3 4.35 processed record 3 4.36 processed record sequence 3 4.37 processing 3 4.38 record 3 4.39 Reference Recording Field 3 4.40 Secondary Standard Amplitude Calibration Tape 3 4.41 Secondary Standard Reference Tape 3 4.42 Separator Mark 3 4.43 Standard Referemce Amplitude 4 4.44 tape noise amplitude 4 4.45 Tape Reference Edge 4 4.46 track 4 5 Environment and safety 4 5.1 Testing environment 4 5.2 Operating environment 4 5.3 Storage environment 4 5.4 Transportation 4 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 6.2 Overall dimensions 6.3 Loading grip 6 6.4 Holding areas 6 6.5 Notches of the lid 6 6.6 Lid dimensions 6 Optical detection of the beginning and end of tape 7 6.7 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-datum and write-inhibit holes 9 6.8.4 10 Datum holes 6.8.5 Access room for tape guides 11 6.8.6 Holes for accessing the hubs 11 ii or Standardizatior No repro h or networking permitted without license from IHS Nt for Resale