ISO 23868-2008 Document management - Monitoring and verification of information stored on 130 mm optical media《文献管理 存储在130 mm光学介质上信息的监测和验证》.pdf
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1、 Reference number ISO 23868:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 23868 First edition 2008-10-15 Document management Monitoring and verification of information stored on 130 mm optical media Gestion de documents Surveillance et vrification de linformation stocke sur des supports optiques de 130
2、 mm ISO 23868:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In d
3、ownloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in
4、the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the addre
5、ss given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO
6、at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedISO 23868:2008(E) ISO 2008 All
7、 rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a
8、subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission
9、 (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical com
10、mittees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not
11、 be held responsible for identifying any or all such patent rights. ISO 23868 was prepared by Technical Committee ISO/TC 171, Document management applications, Subcommittee SC 1, Quality. ISO 23868:2008(E) iv ISO 2008 All rights reservedIntroduction Many organizations now use optical media for long-
12、term storage of information. It is assumed that a disk selected for recording has already been qualified for that purpose. It is therefore important to be able to verify that data have been recorded correctly and remain readable for the required amount of time. Previous ISO Standards clearly specifi
13、ed requirements for interchange, and methods for predicting the lifetime of optical media but did not contain methods for validation of the quality of written data. Longevity is limited both by media degradation and by technology obsolescence. Interchange needs to be regularly verified to assure tha
14、t information on existing recorded media will continue to be recoverable. Users can have a maintenance policy that protects disks against unanticipated failure or use, such as by making one archival copy, another to function as a backup or master, and another for routine access. Hardware support lif
15、ecycles typically vary between 5 years to 10 years and technology lifecycles usually end after 20 years. Consequently, recordings that require a longer lifecycle might have to be transferred to upgraded platforms every 10 years to 20 years. Optical media for long-term storage should be evaluated. Si
16、gnificant longevity differences can exist for disks from different media manufacturers and also between disks from the same media manufacturer. Degradation can be more rapid for disks of very poor initial quality than for high quality recordings. Disks with an initially poor quality do not offer suf
17、ficient headroom to avoid reaching the unrecoverable error threshold before the next scheduled inspection, which for archival disks is to be avoided. This means that a disk of high initial recorded quality that maintains this condition for life is expected to have superior longevity. Powerful cyclic
18、 redundancy check (CRC) error correction systems that are embedded in the disk and utilized by the drive can mask degradation. In the absence of drive standards, functionality does not allow the user to verify, in a simple manner, the quality of information recorded on a particular disk. Methods des
19、cribed in this International Standard specify a quality control policy that can non-destructively identify degradation, and thereby support timely and effective corrective action. INTERNATIONAL STANDARD ISO 23868:2008(E) ISO 2008 All rights reserved 1 Document management Monitoring and verification
20、of information stored on 130 mm optical media 1 Scope This International Standard specifies test methods to determine the quality of data on recorded media and provides specifications enabling end-user organizations to monitor data quality and ongoing conformance with the error limits required for i
21、ts class identified by the manufacturer of the drive/media. This International Standard defines error rate monitoring capabilities and procedures associated with 130 mm optical media while being used in a production environment to ensure that data are still readable throughout the expected life of t
22、he media. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 12651, Elect
23、ronic imaging Vocabulary ISO/IEC 17345, Information technology Data interchange on 130 mm rewritable and write once read many ultra density optical (UDO) disk cartridges Capacity: 30 Gbytes per cartridge First generation ISO/IEC 11976, Data interchange on 130 mm rewritable and write-once-read-many u
24、ltra density optical (UDO) disk cartridges Capacity: 60 Gbytes per cartridge Second generation 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 12651, ISO/IEC 17345, ISO/IEC 11976, and the following apply. 3.1 end-of life EOL loss of interchange where
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