Oh that it would be so easy to do what you want with a little re-direction of the STARTIO.
There are a number of Virtual Tape Systems available, but the SMS re-direction is the simplest thing to do. If you really want to do it yourself, here are a few things to consider before you jump too far in. 1) Modify OPEN/CLOSE/EOV code to intercept the open and close 2) Intercept device allocation 3) What do you do when DASD gets full? Move data to real tape? Delete oldest? 4) If for #3 you move to tape, how about catalog maintenance? 5) The above have not even started to scratch the surface of all the problems and hurtles that you have to overcome. The Hercules I/O is intercepting the physical I/O and when it runs out of space, you are cooked. I don't think that is what you want happening to your production MVS. As I said, I wish it was so easy. Chris Blaicher -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Lindy Mayfield Sent: Tuesday, July 08, 2008 5:31 PM To: [email protected] Subject: Re: STARTIO macro doc I want to do like Flex and Hercules do where the tape is really a file on DASD. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Hal Merritt Sent: 9. heinäkuuta 2008 1:21 To: [email protected] Subject: Re: STARTIO macro doc Consider device redirection using SMS. That is, when an application calls for tape it is transparently redirected to DASD. AFAIK, 'virtual tape' is still physical tape. It is just a way to put many logical tape volumes on one physical tape volume in a way that is transparent to the application. Or am I not understanding what you want to do? -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Lindy Mayfield Sent: Tuesday, July 08, 2008 5:13 PM To: [email protected] Subject: STARTIO macro doc Does anyone have (or know a link to) any documentation on STARTIO? Google gave up a hint that there was a SHARE presentation on it, but no links that I could find. I'm still thinking how one might create a virtual tape on DASD device on z/OS. Maybe STARTIO is the way to do it. Thanks, Lindy ---------------------------------------------------------------------- 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 NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
