On Sunday, 03/11/2007 at 05:12 EST, Alain Benveniste <[EMAIL PROTECTED]> wrote: > I agree that the best would be to buy a product but my client is deaf on > this kind of purpose.
Alain, in my opinion it will cost you a lot of time and effort to research, build and support (!) your own solution and *should* be outside the scope of your contract with your client. Your client is comparing the cost of a commercial product against "free". Explain that there is no "free". He can pay you or another consultant to build a custom solution, pay more for onging support, or he can pay for a commercial solution. Or even buy more tape drives and ATLs. If you do choose to build your own, don't forget that you must also figure out how to forcibly recover a tape drive that has been ASSIGNed to another system, but that system has died or become non-responsive. To answer your question about Diagnose 0xD0, CP does not perform I/O to the tape drive - he just copies information the guest provides into the RDEV control block. He will happily set the volser in the RDEV even if it is not the real volser that is mounted or if there is no tape loaded at all. I think it is there just for EREP records and some messages. Maybe QUERY <rdev> too. Alan Altmark z/VM Development IBM Endicott
