TIOEFSRT certainly looks promising: TIOEFSRT - DURING PROBLEM PROGRAM, ADDRESS OF UCB. DURING ALLOCATION, BITS 0-11 CONTAIN OFFSET, IN THE UCB LOOK-UP TABLE, TO AN ADDRESS FOR A DEVICE REQUIRED OR ELIGIBLE FOR THIS DATA SET. THE UCB LOOK-UP TABLE HAS ADDRESSES OF UCB'S. BITS 12-23 CONTAIN OFFSET, IN THE STEP VOLUME TABLE (VOLT), TO THE VOLUME SERIAL NUMBER FOR THE VOLUME REQUIRED OR ELIGIBLE FOR THIS DATA SET.
I'm not so desperate for ultra performance that I would use any field that was likely to not provide a reliable answer under certain circumstances. It's "product" code that will be shipped to multiple customers, many of which will have MVS environments under which I will not be able to test, such as JES3. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of J R Sent: Friday, February 12, 2010 9:45 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Determining if DUMMY allocation > 1.) Scan the TIOT... finding your DDName... If you're looking in the TIOT, what does TIOESTTB/TIOEFSRT show for a DUMMY allocation? n.html ---------------------------------------------------------------------- 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
