Joel, > > Also, at some point (within the last decade?) allocation of an > SMS-managed sequential data set began allocating the data set in a state > where an initial read returns an immediate EOF rather than random old > track data. It is no longer necessary for some program to explicitly > OPEN such a data set for output for cases where the file should contain > 0 records, and unlike the old days the file is no longer in an undefined > state until the first write after allocation. > JC Ewing > [Ron Hawkins] I think this comes back to what I think the OP is trying to achieved. For an SMS managed dataset to have the implicit EOF it must have a DSORG. Where this cannot be established, (by I think DADSM), it is established practice to apply a default DATACLAS to assign DSORG=PS.
My recollection is DFHSM space mismanagement was the main beneficiary of the EOF, as this allowed the dataset to be migrated and have space released. Ron ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
