ISO/IEC INTERNATIONAL STANDARD 15757 First edition 1998-07-15 Information technology Data interchange on 8 mm wide magnetic tape cartridge Helical scan recording DA-2 format Technologies de I'information Echange de données sur cartouche de spirale Format DA-2 IEC Reference number ISO/IEC 15757:1998(E) IHS unde Not for Resale ISO/IEC 15757:1998 (E) Contents Section 1 - General 1 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridges 1 2.2 Generating drive 1 2.3 Receiving drive 1 3 Normative references 1 4 Definitions 1 4.1 a.c. erase: 2 4.2 algorithm 2 4.3 append point 2 4.4 Average Signal Amplitude 2 4.5 azimuth 2 4.6 back surface 2 4.7 bit cell 2 4.8 byte 2 4.9 cartridge 2 4.10 Channel bit 2 4.11 Cluster 2 4.12 Cyclic Redundancy Check (CRC) character 2 4.13 Digital Sum Variation (DSV) 2 4.14 Error Correcting Code (ECC) 2 4.15 File Mark 2 4.16 flux transition spacing 2 4.17 Logical Beginning of Partition (LBOP) 2 4.18 Logical Block 2 4.19 magnetic tape 2 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 micro- film, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland itted without license from IHS Not for Resale @ISO/IEC ISO/IEC 15757:1998 (E) 4.20 Master Standard Reference Tape 2 4.21Partition 2 4.22 Physical Beginning of Partition (PBOP) 2 4.23 Physical Beginning of Tape (PBOT) 2 4.24 Physical End of Partition (PEOP) 2 4.25 Physical End of Tape (PEOT) 2 4.26 physical recording density 2 4.27 Read Back Check (RBC) 2 4.28 Reference Field 2 4.29 Secondary Standard Reference Tape (SSRT) 2 4.30 Set Mark 3 4.31 Standard Reference Amplitude (SRA) 3 4.32 Standard Reference Current (Ir) 3 4.33 Tape Reference Edge 3 4.34 Test Recording Current (TRC) 3 4.35 Track 3 4.36 Typical Field 3 5 Conventions and Notations 3 5.1 Representation of numbers 3 5.2 Names 3 5.3 Reserved fields 3 6 Acronyms 3 7 Environment and Safety 4 7.1 Testing environment 4 7.2 Operating environment 4 7.3 Storage environment 4 7.4 Transportation 4 7.5 Safety 4 7.6 Flammability 4 Section 2 - Requirements for the case 5 8 Dimensional and mechanical characteristics of the case 5 8.1 General 5 8.2 Overall dimension 5 8.3 Holding areas 6 8.4 Cartridge insertion 6 8.5 Window 7 8.6 Loading grips 7 8.7 Label areas 7 8.8 Datum areas and datum holes 7 8.9 Support areas 8 8.10 Recognition holes 9 8.11 Write-inhibit hole 9 ili CyatinalganaiSandardizato ted without license from IHS Not for Resale