ISO/IEC INTERNATIONAL STANDARD 15718 First edition 1998-08-01 Information technology Data interchange on 8 mm wide magnetic tape cartridge Helical scan recording HH-1 format Technologies de I'information Echange de données sur cartouche de spirale Format HH-1 IEC Reference number ISO/IEC 15718:1998(E) No r THS under itted without license from IHS Not for Resale ISO/IEC 15718:1998 (E) Contents Section 1 - General 1 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridge 1 2.2 Generating drive 1 2.3 Receiving drive 1 3 Normative References 2 4 Definitions 2 4.1 Absolute Frame Address 2 4.2 a.c. erase 2 4.3 algorithm 2 4.4 Area ID 2 4.5 Average Signal Amplitude 2 4.6 azimuth 2 4.7 back surface 22 4.8 bit cell 4.9 byte 2 4.10 cartridge 2 4.11 Channel bit 2 4.12 compressed data 2 4.13 Cyclic Redundancy Check (CRC) character 2 4.14 Data Format ID 2 4.15 End of Data (EOD) 2 4.16 Error Correcting Code 2 4.17 flux transition position 2 4.18 flux transition spacing 2 4.19 Frame 2 4.20 Logical Beginning of Tape (LBOT) 2 4.21 record 2 4.22 magnetic tape 2 4.23 Master Standard Reference Tape 3 4.24 Partition Boundary 3 @ISO/IEC1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic ISO/IEC Copyright Office · Case Postale 56·CH-1211 Geneve 20· Switzerland Printed in Switzerland etworking permitted without license from IHS Not ftr Resale ISO/IEC 15718:1998 (E) @ISO/IEC 4.25 Physical Beginning of Tape (PBOT) 33 4.26 Physical End of Tape (PEOT) 4.27 physical recording density 33 4.28 Reference Field 4.29 Secondary Standard Reference Tape 3 4.30 Standard Reference Amplitude (SRA) 3 4.31 Standard Reference Recording Current 3 4.32 Tape Reference Edge 33 4.33 Test Recording Current 4.34 track 3 4.35 Typical Field 3 4.36 uncompressed data 3 5 Conventions and notations 3 5.1 Representation of numbers 3 5.2 Names 4 6 Acronyms 4 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 5 7.6 Flammability 5 Section 2 - Requirements for the case 6 8 Dimensional and mechanical characteristics of the case 6 8.1 General 6 8.2 Overall dimension 6 8.3 Holding areas 7 8.4 Cartridge insertion 7 8.5 Window 8 8.6 Loading grips 8 8.7 Label areas 8 8.8 Datum areas and datum holes 8 8.9 Support Areas 9 8.10 Recognition holes 10 8.11 Write-inhibit hole 10 8.12 Pre-positioning surfaces 11 8.13 Cartridge lid 11 8.14 Cartridge reel lock 12 8.15 Reel access holes 13 8.16 Interface between the reels and the drive spindles 13 8.17 Light path 15 8.18 Position of the tape in the case 15 8.19 Tape path zone 16 8.20 Tape access cavity 16 8.21 Tape access cavity clearance requirements 16 Section 3 - Requirements for the Unrecorded Tape 33 9 Mechanical, physical and dimensional characteristics of the tape 33 9.1 Materials 33 CoyrheationalganzationStandardizatio ii nited without license from IHS Not fr Resale ISO/IEC 15718:1998 (E) ISO/IEC 9.2 Tape length 33 9.2.1 Magnetic tape 33 9.2.2 Leader and trailer tapes 33 9.2.3 Splicing tape 33 9.3.1 Width of magnetic tape 33 9.3.2 Width of leader and trailer tapes 33 9.3.3 Width and position of splicing tape 33 9.4 Discontinuities 33 9.5 Thickness 33 9.5.1 Thickness of the magnetic tape 33 9.5.2 Thickness of leader and trailer tape 34 9.5.3 Thickness of the splicing tape 34 9.6 Longitudinal curvature 34 9.7 Cupping 34 9.8 Coating adhesion 34 9.9 Layer-to-layer adhesion 35 9.10 Tensile strength 35 9.10.1 Breaking strength 35 9.10.2 Yield strength 35 9.11 Residual elongation 35 9.12 Electrical resistance of coated surfaces 35 9.13 Tape winding 36 9.14 Light transmittance of tape 36 9.15 Media Recognition System (MRS) 36 10 Magnetic recording characteristics 37 10.1 Typical Field 37 10.2 Signal amplitude 38 10.3 Resolution 38 10.4 Overwrite 38 10.5 Ease of erasure 38 10.6 Tape quality 85 10.6.1 Missing pulses 38 10.6.2 Missing pulse zone 38 10.7 Signal-to-Noise