On Sat, 30 Jul 2011 22:31:57 +0100 CM Poncelet <ponce...@bcs.org.uk> wrote:
:>What I am saying is that, on INPUT, a dataset's physical DCB attributes :>from its DSCB on DASD cannot be overriden by a JCL or program DCB. :>Consider the following JCL where :>SYS1.RECFMVBA.LRECL137.BLK27998 has physical :>DCB=(RECFM=VBA,LRECL=137,BLKSIZE=27998,DSORG=PS) :>SYS1.RECFMFBA.LRECL137.BLK27948 has physical :>DCB=(RECFM=FBA,LRECL=137,BLKSIZE=27948,DSORG=PS): :>//IEBGENER EXEC PGM=IEBGENER :>//SYSPRINT DD SYSOUT=* :>//SYSIN DD DUMMY :>//* :>//SYSUT1 DD DISP=SHR,DSN=SYS1.RECFMVBA.LRECL137.BLK27998, :>//* cannot override dataset's DCB on DASD via JCL, for INPUT: :>// DCB=(RECFM=FBA,LRECL=137,BLKSIZE=27948) :>//* :>//SYSUT2 DD DISP=SHR,DSN=SYS1.RECFMFBA.LRECL137.BLK27948, :>// DCB=(RECFM=FBA,LRECL=137,BLKSIZE=27948) :>//* :>//IDCAMS EXEC PGM=IDCAMS :>//SYSPRINT DD SYSOUT=* :>//* :>//SYSUT1 DD DISP=SHR,DSN=SYS1.RECFMVBA.LRECL137.BLK27998, :>//* cannot override dataset's DCB on DASD via JCL, for INPUT: :>// DCB=(RECFM=FBA,LRECL=137,BLKSIZE=27948) :>//* :>//SYSUT2 DD DISP=SHR,DSN=SYS1.RECFMFBA.LRECL137.BLK27948, :>// DCB=(RECFM=FBA,LRECL=137,BLKSIZE=27948) :>//SYSIN DD * :> REPRO INFILE(SYSUT1) + :> OUTFILE(SYSUT2) :>//* :>According to you, the DCB=(RECFM=FBA,LRECL=137,BLKSIZE=27948) on SYSUT1 :>(opened for input) should override the dataset's :>DCB=(RECFM=VBA,LRECL=137,BLKSIZE=27998,DSORG=PS) on DASD. But that is :>not the case. :>If you set up and run the jobsteps above, both IEBGENER and IDCAMS :>report "IEB351I I/O ERROR <etc.> SYSUT1, READ, WRNG.LEN.RECORD, etc." :>when reading SYSUT1. This is because the dataset's DASD DSCB/DCB :>attributes override those coded in the JCL (and would also override the :>programs's DCB, if hard-coded), for INPUT. Not at all. It proves that the DCB - was - overridden. Of course, the DCB override does not affect the physical data. If the actual data block length is longer than the DCB block length there will be an I/O error. For example, if your override was for a - larger - blocksize it would have worked fine (other than perhaps IDCAMS/IEBGENER) warnings about different block sizes. -- Binyamin Dissen <bdis...@dissensoftware.com> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
