ISO/IEC INTERNATIONAL STANDARD 15307 First edition 1997-12-01 Information technology Data interchange on 12,7 mm 128-track magnetic tape cartridges - DLT 4 format Technologies de I'information - Echange de donnees sur cartouches de bande magnétique de 12,7 mm, 128 pistes — Format DLT 4 IEC ISo Reference number ISO/IEC 15307:1997(E) ISO/IEC 15307:1997 (E) Contents Page Section 1 - General 1 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridges 1 2.2 Generating systems 1 2.3 Receiving systems 1 3 Normative references 1 4 Definitions 1 4.1 Average Signal Amplitude 1 4.2 azimuth 1 4.3 back surface 1 4.4 Beginning-Of-Tape marker (BOT) 1 4.5 byte 1 4.6 cartridge 2 2 4.7 Cyclic Redundancy Check (CRC) character 4.8 Early Warning (EW) 2 2２ 4.9 Error-Detecting Code (EDC) 4.10 End-Of-Tape marker (EOT) 4.11 Entity 22 4.12 Error-Correcting Code (ECC) 4.13 flux transition position 22 4.14 flux transition spacing 4.15 Logical Block 22222- 4.16 logical track 4.17 magnetic tape 4.18 Master Standard Reference Tape 4.19 object 4.20 page 22 4.21 physical block 4.22 physical recording density ２２２３ 4.23 physical track 4.24 Record 4.25 Reference Edge 4.26 Reference Field 3 4.27 Secondary Standard Reference Tape 33 4.28 Standard Reference Amplitude (SRA) 4.29 Standard Reference Current 3 4.30 Test Recording Current 3 4.31 Typical Field 3 @ISO/IEC1997 All rights reserved. Unless otherwise specified no part of this publication may be 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 ISO/IEC 15307:1997(E) @ISO/IEC 3 5 Conventions and notations 3 5.1 Representation of numbers 3 5.2 Dimensions 3 5.3 Names 3 5.4 Acronyms 4 6 Environment and safety 4 6.1 Cartridge and tape testing environment 4 6.2 Cartridge operating environment 4 6.3 Cartridge storage environment 6.4 Safety 4 4 6.4.1 Safeness 4 6.4.2 Flammability 5 6.5 Transportation 5 Section 2 - Requirements for the unrecorded tape 5 7 Mechanical and electrical requirements 5 7.1 Material 5 7.2 Tape length 5 7.3 Width 5 7.4 Total thickness 7.5 Discontinuity 5 7.6 Longitudinal curvature 5 7.6.1 Requirement 7.6.2 Procedure 5 5 7.7 Out-of-Plane distortions 5 7.8 Cupping 7.9 Roughness of the coating surfaces 5 5 7.9.1 Roughness of the back coating surface 7.9.2 Roughness of the magnetic coating surface 6 6 7.10 Coating adhesion 9 7.11 Layer-to-layer adhesion 6 7.11.1 Requirements 6 7.11.2 Procedure 7 7.12 Modulus of elasticity 7 7.12.1 Requirement 7 7.12.2 Procedure 7 7.13 Flexural rigidity 7.13.1 Requirement 7 8 7.13.2 Procedure 8 7.14 Tensile yield force 7.14.1 Procedure 8 8 7.15 Electrical resistance 8 7.15.1 Requirement 8 7.15.2 Procedure 9 7.16 Inhibitor tape 9 7.17 Abrasivity ili