ISO/IEC INTERNATIONAL STANDARD 14251 Firstedition 1995-08-01 Information technology -- Data interchange on 12,7 mm 36-track magnetic tape cartridges Technologies de I'information - Echange de donnees sur cartouches de bande magnetique de12.7mm,36pistes IEC Reference number ISO/IEC 14251:1995(E) Copyright Intemational Organization for Standardization Not for Resale ISO/IEC 14251 : 1995 (E) Contents Section 1 - General 1 1 Scope 1 2Conformance 1 2.1 Magnetic tape cartridge 1 2.2 Generating system 1 2.3 Receiving system 1 3 References 2 4 Definitions 2 4.1 algorithm 2 4.2 algorithmically Processed Data 2 4.3 Beginning of Tape (BOT) 2 4.4 byte 2 4.5 Cyclic Redundancy Check (CRC) character 2 4.6 Data Records 2 4.6.1 Processed Data Record (PDR) 2 4.6.2 Host Data Record 2 4.6.3 Logical Data Record (LDR) 2 4.6.4 User Data Record (UDR) 2 4.7 End of Tape (EOT) 2 4.8 Error correcting code (ECC) 2 4.9 flux transition position 22 4.10 flux transition spacing 4.11 Frame 222 4.12 logical backwards 4.13 logical forwards 4.14 magnetic tape 223- 4.15 Master Standard Reference tape 4.16 packet 4.17 pad byte 3 4.18 physical backward 3 4.19 physical forward 3 4.20 physical recording density 3 ISO/IEC 1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, eiectronic 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 Copyright International Organization for Standardization No reproduction or networking permitted without license from IHS Not for Resale ISO/IEC 14251 : 1995 (E) CISO/IEC 4.21 Processed Data 3 3 4.22 Secondary Standard Reference tape 33 4.23 Standard Reference Amplitude (SRA) 4.24 Standard Reference Current 4.25 Tape Reference Edge 3 3 4.26 Test Recording Current 3 4.27 track 3 4.28 Typical Field 4.29 transformation 3 4.30 Wrap 3 3 4.31 Half-Wrap 3 5 Conventions and notations 3 5.1 Representation of numbers 3 5.2 Names 4 5.3 Acronyms 4 6 Environment and safety 4 6.1 Cartridge/tape testing environment 4 6.2 Cartridge operating environment 6.3 Cartridge storage environment 4 6.4 Safety requirements 5 5 6.4.1 Safeness 5 6.4.2 Flammability 5 6.5 Transportation Section 2 - Characteristics of the tapes 5 5 7 Characteristics of the tapes 5 7.1 Material 5 7.2 Tape length 5 7.3 Tape width 5 7.4 Tape discontinuity 5 7.5 Total thickness of tape 5 7.6 Base material thickness 7.7 Longitudinal curvature 6 6 7.7.1 CST tape 6 7.7.2 ECCST tape 6 7.8 Out-of-plane distortions 6 7.9 Cupping 6 7.10 Dynamic frictional characteristics 6 7.10.1 Frictional drag between the recording surface and the back surface 6 7.10.2 Frictional drag between the tape recording surface and ferrite after environmental cycling 7 7.11 Coating adhesion 8 7.12 Flexural rigidity 7.13 Electrical resistance of coated surfaces 8 9 7.14 Tape durability 9 7.15 Inhibitor tape 9 7.16 Tape abrasivity 9 7.17 Accelerated life test 9 7.18 Data integrity test 9 7.18.1 Requirement ili No reproduction or networking permitted without license from IHS Not for Resale