IEC INTERNATIONAL STANDARD 62345 First edition 2005-03 HOENSERTALUSENI THISLOCEANIONBANYASORELIED BY BOK SPLY BUREAU. IDformatfor50mmmagneto-optical disc system 3 [EC Reference number IEC62345:2005(E) Publication numbering As from 1 January 1997all IEC publications are issued with adesignation in the 60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1. Consolidatededitions The IEC is now publishing consolidated versions of its publications.For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively,to the base publication, the base publication incorporating amendment 1 and the base publication incorporating amendments1and2 FurtherinformationonIEC publications The technical content of IEC publications is kept under constant reviewby theIEC, thus ensuring that the content reflects current technology. Information relating to HOENSERTALUSENI TISLOCEANIONBANYASORLIED BY BO SPLY BUREAU. this publication,including its validity,is available in the IEc Catalogue of publications (see below)in addition to new editions,amendments and corrigenda. Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication, as well as the list of publications issued, is also availablefrom thefollowing: IECWeb Site (www.iec.ch) Catalogue of IEC publications and date of publication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IEC Just Published This summaryof recently issued publications (www.iec.ch/online news/ justpub) is also availableby email.Please contact the Customer Service Centre (see below)for further information. CustomerServiceCentre If you have any questions regarding this publication or need further assistance, pleasecontactthe CustomerServiceCentre: Email:[email protected] Tel: +41229190211 Fax: +41229190300 IEC INTERNATIONAL STANDARD 62345 First edition 2005-03 HOENSERTAMUSENI HISLOCEANIONBANLYASOPLIED BY BO SPLYBUREAU. IDformatfor50mmmagneto-optical disc system mite ASLUP ?IEC2005— Copyright - all rights reserved mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varembe, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00±E-mail: [email protected] Web: www.iec.ch XA PRICE CODE EC Commission Electrotechnique Internationale InternationalElectrotechnicalCommission MeAyHapoAHag 3neKTpoTexHyeCkan KoMCCMg For price, see current catalogue 62345@IEC:2005(E) -2. CONTENTS FOREWORD. Scope .9 Normative references 2 3 Terms and definitions. 4 Conventionsand notations. .12 4.1 Representation ofnumbers... 4.2 Names... 5 List of acronyms .. .13 6 General description of the optical disc cartridge 7 General requirements NS 7.1 Environments. 7.2 Temperature shock.. 7.3 Safety requirements.. .15 Reference drive 8 ATITHIS 8.1 Optical system. .15 8.2 Optical beam.. 16 8.3 Read channels 16 AN 8.4 Tracking.... CONBN 8.5 Rotation of the disc.. ..17 9 Mechanical and physical characteristics.. ..17 9.1 Dimensional and physical characteristics of the cartridge SUT LO 9.2 Dimensional,mechanical and physical characteristics of the disc. ..32 9.3 Interfacebetweencartridge and drive 10 Format of information .33 10.1 Track geometry ... ...33 10.2 Track format... 10.3Frameformat.. ..35 10.4 ECC Block format... ..42 10.5 Recordingcode ..43 10.6Format of theInformationZone 10.7 Formatof theDataZone 10.8 Defect Management.. ...51 11 Characteristicsofembossed information ..55 11.1 Method of testing...... 11.2 Signals from grooves (see Figure 26).... 11.3 Signals from wobble groove (see Figure 27). ...57 11.4 Signal from fine clock marks (see Figure 28) 12 Characteristics of the recording layer.. ..59 12.1 Method of testing.. ..59 12.2 Magneto-optical characteristics. ..60 13Filesystem... ..63 13.1 Volume.. ...63 13.2File ..73 62345@IEC:2005(E) - 3 1