> Will that stunt works with VTS? I mean, since VTS is supposed to 
> *emulate* tapes (34980/3490/Magstar/etc),  in theory you could do 
> that little trick. Possibe or not? What will those hardware do when 
> receiving such a CCW?

It will not work with either of the two VTS systems that I have used. I 
don't think it will work with any of the others either. On the two VTS 
systems that I have seen, the end-of-tape-mark is immediately after the 
end-of-data-mark. The old physical hardware would stop writing new blocks 
at the the end-of-tape-mark (reflective foil on the back side of tape). I 
was never able to write data after that point.

If data is to be recovered from a VTS tape that was overwritten, it needs 
to be done on the back-end system before the disk space or stacker tape 
gets overwritten.

Thank you and have a Terrific day!

Jonathan Goossen, DTM
ACT Mainframe Storage Group
Personal: 651-361-4541
Department Support Line: 651-361-5555
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