Hi Bob,
First rule of Mount REquests:
Don't pay any attention to what media is being requested
Unless, of course, it's a Mount Request for reading ;-)
When we are at it, my second rule of Mount Requests (in a library/autoloader setup):
If it requests the medium to be put in the cleaning slot, first unload the cleaning tape from that slot.
Sadly, DP almost always requests media into the slot currently occupied by my CLNU tapes, apparently because it thinks they are somehow less occupied than slots with data tapes. If not unloaded, on accepting the MR, DP will first load the medium from the indicated slot (even though it knows there is a CLN tape there, and it also knows where the correct medium is situated - a barcode scan made sure of that), leading to inadvertent cleaning taking place (due to HP's non-standard cleaning policy). It will then unload the CLN and load the correct medium. If the slot in question is empty, at least there is no unwanted head abrasion. I would so love to see this nonsense fixed...
HTH,
An"tired of explaining this to customers a thousand times"dre.