7665 International Standard (ISO INTERNATIONALORGANIZATION FORSTANDARDIZATIONMEXAYHAPOAHAAOPIAHM3ALWANO CTAHAAPTW3ALMM-ORGANISATION INTERNATIONALEDENORMALISATION Information processing -- File structure and labelling of flexible disk cartridges for information interchange Traitement de I'information -- Structure des fichiers et étiquetage des cartouches a disquette pour I'echange d'information First edition - 1983-12-15 ISO 7665-1983 (E) UDC 681.327.63 Ref. No. ISO 7665-1983 (E) Descriptors : data processing, information interchange, flexible disks, files, data blocks, labelling, characteristics. Price based on 22 pages Copyright Intermational Organization for Standardization Not for Resale Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationof national standards bodies (ISO member bodies). The work of developing International Standards is carried out through iso technical committees. Every member body interested in a subject for which a technical committee has been authorized has the and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. International StandardISO7665was developed byTechnical Committee ISO/TC97, Information processing systems, and was circulated to the member bodies in October 1982. It has been approved by the member bodies of the following countries : Australia Italy Sweden Belgium Japan Switzerland eqnd Mexico United Kingdom Egypt, , Arab Rep. of Netherlands USA Germany, F.R. New Zealand USSR Hungary Poland Ireland Spain Nomemberbodyexpresseddisapprovalofthedocument. International Organization for Standardization,1983 Printed in Switzerland = Copyiatlntenatinal organizatinfo Standardization or networking permitted without license from IHS Not for Resale Contents Page 1 Scope and field of application 2 Conformance References 4 Definitions 5 Notation. 2 5.1 Specification of label content 2 5.2 Label fields .. 3 6 Arrangement of labels and files . . 3 6.1 Applicability of this International Standard to identified types of flexible disk cartridge ... 3 6.2 Numberof sides. 3 6.3 Organization of space on a flexible disk cartridge . 3 6.4 Index cylinder (cylinder 00) . 3 6.5 Contents of cylinders with address 01 to Cylinder-Limit . . . . File structure for data interchange 4 7.1 Blocks 7.2 Records 7.3 Files 6 7.4 File organization...... 7.5 Record formats and attributes permitted for interchange 7.6 Relevant fields for file structure Format and contents of labels 8.1 Character set and coding 8.2 Justification of characters 8.3 Labels 8.4 VolumeLabel (VOL1) 8.5 File Label (HDRI).. 8.6 Error Map Label (ERMAP) 13 6 Initialization and processing of label fields 13 9.1 Volume Label (VOL1) 13 9.2 File Label (HDR1)... . 14 9.3 Error Map Label (ERMAP) 14 10 Physical records 14 10.1 Structure of data blocks 14 10.2 Deleted data 14 10.3 Defective physical records 14 10.4 Handling of defective physical records 14 11 Levels of interchange 15 11.1 General . 15 11.2 BASIC INTERCHANGE 15 11.3 EXTENDEDINTERCHANGELEVEL1 16 11.4 EXTENDEDINTERCHANGELEVEL2 16 11.5 Files not conforming to specified interchange levels . 16 Annexes A 17 B Data interchange standards and parameters 22 ii Copyright Intemational Organization for Standardization No reproduc d without licensefrom IHS Not for Resale