ISO/IEC INTERNATIONAL STANDARD 8441-1 First edition 1991-05-15 Information technology - High density digital recording (HDDR) Part 1: Unrecorded magnetic tape for (HDDR) applications Technologies de I'information -- Enregistrement numerique a haute densite (HDDR) Partie 1: Bande magnetique vierge pour les applications HDDR Reference number ISO/IEC 8441-1:1991(E) Copyright International Organization for Standardization Not for Resale ISO/IEC 8441-1:1991(E) Contents Page Scope 1 2 Normative references Definitions 3 General 4 3 4.1 Materials 3 4:2 Tape reels 3 4.3 Tape wind 3 4.4 Packaging 3 5 Test condition 3 5.1 General 3 Conditioning 5.2 3 5.3 Test environment 3 6 Dimensions 3 6.1 Tape width 3 6.2 Tape length 6.3 Tape thickness Physical properties 4 7 7.1 Yield strength 4 7.2 Elongation under stress 8 Performance 5 8.1 Reference test system 5 8.2 Sensitivity 5 8.3 Wavelength response 8.4 Output level uniformity (long term) 6 8.5 Instantaneous nonuniformity (dropouts) C ISO/IEC 1991 or by any means, electronic or mechanlcal, Including photocopying and microfilm, without permission in writing from the publisher Printed in Switzerland ii Not for Resale ISO/IEC 8441-1:1991(E) 8.6 Signal-to-noise ratio 6 8.7 Ease of erasure 8.8 Electricalsurfaceresistance 8.9 Environmental performance Durability 8.10 8.11 Abrasivity Annexes Giass- and metai-flanged tape,reels 10 A Wear of recording heads 11 Environmental conditions 12 c c.1 General 12 C.2 Normal operating conditions 12 C.3 Extended operating conditions 12 12 C.4 Severe operating conditions?) Shipping and short-term storage 12 C.5 C.6 Extended shipping and short-term storage 12 C.7 Recommended long-term storage 12 Deterioration of tape arising from exposure to adverse C.8 environmental conditions 12 Severe operating conditions 14 D D.1 Application 14 D.2 Conditions 14 D.3 Enyironmental performance tests for limited duration recording under severe conditions 14 D.3.1 Definition of severe conditions 14 D.3.2 14 Requirement D.3.3 Test procedure 14 Surface electricat resistance testing 16 E Scope E.1 16 Test specimens E.2 16 E.3 16 Apparatus E.3.1 Electrodes for testing insulation resistance 16 ii Copyright International Organization for Standardization Not for Resale