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

ALLOCATEparameter. If you assign a data set name, the system keeps and catalogs aNEW data set. If you do not assign a data set name, the system deletes thedata set at step termination.NCP(number-of-channel-programs)This gives the maximum number of READ or WRITE macro instructions thatare allowed before a CHECK macro instruction is entered. The number mustnot exceed 99 and must be less than 99 if a lower limit was established whenthe operating system was generated. If you are using chained scheduling, youmust assign an NCP value greater than 1. If you omit the NCP parameter, thedefault value is 1.OPTCD(A,B,C,E,F,H,J,Q,R,T,W,Z)This lists optional services: (See also the OPTCD subparameter of the DCBparameter in z/OS MVS JCL Reference for details.)ABCEFHJQRTWRequires the actual device addresses be presented in READ andWRITE macro instructions.Requires the end-of-file (EOF) recognition be disregarded for tapes.Uses chained scheduling.Asks for an extended search for block or available space.Returns device address feedback from a READ or WRITE macroinstruction in the form it is presented to the control program.Requests the system to check for and bypass. For further information,see z/OS MVS JCL Reference.Makes the character after the carriage control character the tablereference character for that line. The table reference character tells TSOwhich character arrangement table to select when printing the line.Translates a magnetic tape from ASCII to EBCDIC or from EBCDIC toASCII.Requires relative block addressing.Requests the user totaling facility.Tells the system to perform a validity check when it writes data on adirect access device.Z Asks the control program to shorten its normal error recoveryprocedure for input on magnetic tape.You can use any or all the services by combining the characters in anysequence, separating them with blanks or commas.For PDSEs, the system ignores OPTCD values other than OPTCD(J). OPTCD(J)requires that the first data byte in the output data line is a 3800 table referencecharacter.POSITION(sequence-no.)This is the relative position (1-9999) of the data set on a multiple data set tape.The sequence number corresponds to the data set sequence number field of thelabel parameter in JCL.PRIVATEThis assigns the private–volume use attribute to a volume that is neitherreserved nor permanently in resident. It corresponds to the PRIVATE keywordof the VOLUME parameter in JCL.42 z/OS V1R6.0 DFSMS Access Method Services for Catalogs