This part of IEC 62702-1 specifies a method of data-quality assurance for writable disks (hereinafter "disks") which are specified for long-term data storage, and a data migration method, which can sustain the recorded data on disks for long-term audio data preservation. The writable disks include BD Recordable disk and BD Rewritable disk.dition 1.0 2017-11 INTERNATIONAL STANDARD colour inside Audio archive system – Part 1-2: BD disk and data migration for long-term audio data storage IEC 62702-1-2:2017-11(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright ？ 2017 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electron