IBM 5280 Distributed Data System - Index of

DecimalPosition34DescriptionPhysical record length; must be the same as position 76 of thevolume label.Blank123128-byte records.256-byte records.512-byte records.1024-byte records.35-3940End of extent (EOE); the address of the last sector reserved for thisdata set, using the same format as BOE.Record Block Format:CharacterBlank orFvMeaningFixed-length records in the fixed blocks.Record length is variable; not supported on the5280.41Bypass Indicator:CharacterBBlankMeaningNot to be exchanged or copiedCan be exchanged or copied424344Data set security; data set cannot be accessed if this byte containsother than a block.Write protect; if this position contains a P, the data set can only beread. This field must be blank to allow both reading and writing.Exchange Type Indicator:CharacterBlankHEMeaningBasic exchange for diskette 1 and 2, formats1 and 4.H exchange for diskette 2D, format 7.No summation of attributes exists.I exchange.Diskette Labels 357