IBM 5280 Distributed Data System - Index of

Appendix E. Diskette LabelsDISKETTE VOLUME LABELThe diskette volume label identifies the volume, owner, security and sequence ofthe physical records on the tracks of the specified volume. The volume label islocated at track 00, head 0, record 7, on each diskette. The following table showsthe format of the diskette volume label (VOL 1).DecimalPositionDescription01-03Volume label identifier; must be C'VOl'.04Volume label number; must be C / l'.05-10Volume identification field; up to 6 alphameric characters.11Accessibility indicator; a blank in this field permits access to thisdiskette. Any other character requires additional owner 10 informationto permit access.12-24Not used.25-37System code; not supported on the 5280.38-51Owner identification field; up to 14 alphameric characters used toaccess secure diskette.52-64Not used.65Volume label Extension Indicator:CharacterBlank or 0MeaningNo additional cylinders allocated.1-9Number of additional cylinders allocated; validonly on diskette 20.66-71Not used.72Surface Indicator:CharacterMeaningBlank 1 surface, FM recording (diskette 1)2 2 surfaces, FM recording (diskette 2)M 2 surfaces, M FM recording (diskette 20)Diskette Labels 353