I would venture that PDS-Es use (Media Manager?) sophisticated channel programs which move several 4K pages at a time into the buffers, so I think the total buffer space perhaps matters more than the buffer (in this case also the block-) size.
Tim Hare Senior Systems Programmer Florida Department of Transportation (850) 414-4209 ---------------------------------------------------------------------- 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
