ISO/IEC INTERNATIONAL STANDARD 11321 First edition 1992-12-15 Information technology - 3,81 mm wide magnetic tape cartridge for information interchange - Helical scan recording DATA/DAT format Technologies de I'information -- Cartouche de bande magnétique de 3,81 mm de large pour I'échange d'information - Enregistrement hélicoidal Format DATA/DAT Reference number ISO/IEC 11321:1992(E) Copyright Intermational Organization for Standardization Not for Resale ISO/IEC 11321:1992 (E) Contents 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 AbsoluteFrameNumber (AFN) 4.2 AC erase 4.3 Area ID 4.4 Automatic Track Finding (ATF) 4.5 Average Signal Amplitude 4.6 azimuth 4.7 back surface 4.8 byte 4.9 cartridge 4.10 Channel bit 4.11 Data Format ID 4.12 End of Data (EOD) 4.13 End of Information (EOl) 4.14 End of Partition (EOP) 4.15 Error Correcting Code (ECC) 4.16 flux transition position ISO/IEC 1992 All rights reserved. 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 per- mission in writing from the publisher. ISO/IEC Copyright Office · Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ialiandadzai No repr nitted without license from IHS Not for Resale ISO/IEC 11321:1992 (E) 4.17 flux transition spacing 22 4.18 frame 4.19 group 2 4.20 Logical Beginning of Tape (I.BOT) 2 4.21 Logical End of Tape (l.EOT) 2 4.22 magnetic tape 2 4.23 Master reference 2 4.24 Master Standard Amplitude Calibration Tape 2 4.25 Master Standard Reference Tape 2 4.26 optimum recording field 2 4.27 partition 2 4.28 partition reference 3 4.29 Physical Beginning of Tape (PB()T) 3 4.30 Physicat End of Tape (PEOT) 3 4.31 physical recording density 3 4.32 pre-recording condition (maximum recorded levels) 3 4.33 record 3 4.34 Reference Recording Fieldt 3 4.35 Secondary Standard Amplitude Calibration Tape 3 4.36 Secondary Standard Reference Tape 3 4.37 separator 3 4.38 Standard Reference Amplitude 3 4.39 tape noise amplitude 3 4.40 Tape Reference Edge 3 4.41 track 3 5 Environment and safety 3 5.1 Testing environment 3 5.2 Operating environment 3 5.3 Storage environment 4 5.4 Transportation 4 5.5 Safety 4 5.6 Flammability 4 Section 2 ： Requirements for the case 6 Dimensional and mechanical characteristics of the case 4 6.1 General 4 6.2 (verall dimensions (figures 6 and 7) 5 6.3 L.oading grip (figure 6) 5 6.4 Holding areas (figure 6) 5 6.5 Notches of the lid (figures 5 and 8) 6 6.6 Lid dimensions (figures 6 to 8) 6 6.7 Optical detection of the heginning and end of tape (figure 9 and 12) 7 6.8 Bottom side (figures 10 and 11) 7 6.8.1 l.ocking mechanism of the slider 7 6.8.2 Access holes 8 6.8.3 Recognition, suh-dtatum ancl write-inhibit holes 8 6.8.4 Datum holes 10 ili CopyrightiematinalOrganizatinforStandardization mitted without license from IHS Not for Resale ISO/IEC 11321:1992 (E) 6.8.5 Access room for tape guides 10 6.8.6 Holes for accessing the hubs 11 6.8.7 Internal structure of the lower half (figure 12) 11 6.8.8 Light path (figure 12) 12 6.8.9 Support areas (figure 13) 12 6.8.10 Datum areas (figure 13) 12 6.8.11 Relationship between support and Datum Areas and Reference Plane Z (figure 14) 13 6.9 Huhs (figures 15, 16) 13 6.10 Leader and trailer attachment 13 6.11 Interface between the hubs and the drive spindles (figure 17) 13 6.12 Opening of the lid (figure 18) 14 6.13 Release of the hub kocking mechanism (figures 19, 20) 14 6.14 Label area (figures 21, 22) 14 Section 3 : Requirements for the unrecorded tape 25 7 Mechanical, physical and dimensional characteristics of the tape 25 7.1 Materials 25 7.2 Tape length 25 7.2.1 Length of magnetic tape 25 7.2.2 Length of leader and traiter tapes 25 7.3 Tape width 25 7.4 Discontinuities 25 7.5 Total thickness 25 7.6 Longitudinal curvature 25 7.7 Cupping 25 7.8 Coating adhesion 26 7.9 I