z/OS V1R6.0 DFSMS Access Method Services for Catalogs

ALLOCATEOptional ParametersACCODE(access code)Assigns the accessibility code for an ISO/ANSI output tape data set, whichprotects it from unauthorized use. You can use up to eight characters in theaccess code, but ISO/ANSI validates only the first character. The ACCODE cannow be any of the following 57 ISO/ANSI a-type characters: blank, upper caseletters A-Z, numeric 0-9, or one of the special characters !*″%&’()+,-./:;?_Password protection is supported for ANSI tape data sets under thePASSWORD/NOPWREAD options on the LABEL parameter. Password accessoverrides any ACCODE value if you use both options.ALTFILE(name)The name of the SYSIN subsystem data set that is to be allocated, and can beup to eight characters. The system uses this parameter primarily in thebackground.This gives the length in bytes of the average block.AVGREC(U|K|M)Determines the size of the average record block. You can use the followingvalues:UUse the primary and secondary quantities as given on the SPACEparameter.K Multiply primary space quantity and secondary space quantity by 1024(1 KB).M Multiply primary space quantity and secondary space quantity by1,048,576 (1 MB).Use the AVGREC parameter to define a new data set when:v The units of allocation that is requested for storage space are records.vThe primary and secondary space quantities used with the SPACE parameterrepresent units, thousands, or millions of records.When you use AVGREC with the SPACE parameter, the first subparameter forthe SPACE parameter must give the average record length of the records.Use the AVGREC parameter when you want to show records as the units ofallocation. You can also use the AVGREC parameter to override the spaceallocation defined in the data class for the data set.If SMS is not active, the system checks the syntax and then ignores theAVGREC parameter.BFALN(F|D)Gives is the boundary alignment of each buffer:FEach buffer starts on a fullword boundary that might not be adoubleword boundary.D Each buffer starts on a doubleword boundary.If you do not use this parameter, the system defaults to a doublewordboundary.BFTEK(S|E|A|R)Is the type of buffering that you want the system to use, such as:S Simple bufferingE Exchange buffering34 z/OS V1R6.0 DFSMS Access Method Services for Catalogs