ISO/IEC INTERNATIONAL STANDARD 18630 First edition 2023-11 Information technology Digitally recorded media for information interchange and storage Quality discrimination method for optical disks and operating method of storage systems for long-term data preservation Reference number IEC ISO/IEC 18630:2023(E) ISO @IS0/IEC2023 IS0/IEC 18630:2023(E) COPYRIGHTPROTECTED DOCUMENT @IS0/IEC2023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or ISoO's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email:[email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2023 -All rights reserved