>are you saying that the application program which actually writes the tape has >the last word to decide how to block the dataset on tape ?
This is explained in the JCL manual, in the section regarding BLKSIZE (at least it used to be). But, the short answer is "YES". I've known experienced application programmers who didn't "know better"; they just didn't "know". - Too busy driving to stop for gas! ---------------------------------------------------------------------- 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
