Thanks for the reply Mark, and I hope you had a nice time away.
DPM offers 3 enquiry tools.
It offers 'Inventory Library' with two options:
1. Fast Inventory - Supposed to just read the barcode from each tape
2. Detailed - Each tape is mounted in the drive and read
'Rescan': Scan for libraries (Will determine if a new one has appeared, or if one has gone offline etc)
'Refresh': Seems to just refresh the status of the selected library.
Now, when I first changed to the HP library, i did briefly see the barcodes appear in DPM, but then they went again. Due to the issue mentioned in my other post, I can't do any enquiry's at the moment. :(
Do you know of a driver download for the STK changers for Server 2008 R2-64? Then I can try it. :)
Attached please find the tcp dump when doing inventory in DPM.
the response of "READ ELEMENT STATUS" command from HP VTL contains barcode of the tapes but can't find similar response in MHVTL response.