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I should preface this by saying that we can't upgrade to a newer version of Retrospect until we upgrade our server as we're running the latest version that it compatible with our server software (Avid Isis 3.1.x) so we're stuck on 7.7 for the immediate future. Our LTO 5 drive (HP Ultrium 3000 SAS) was giving us increasingly more issues, really slow backups and the end result of all my research was that it appeared the tape heads were giving out so we ended up buying a new LTO 6 drive (HP Ultrium 6250 SAS) which has worked great for new backups on the LTO 5 tapes we have left. The problem that we're running into is that when we try to do a normal backup onto a tape that was initially written by the old drive the new one asks for a new tape, even though there should be plenty of space left on the tape. So if I do a recycle backup it works fine and doesn't require a second tape, but if this is going to happen for all of the old backups then we're going to spend a great deal more time on this than I'd like. When I tried the last one I clicked on the properties of the tape itself and Retrospect showed a media error on the tape I was trying to use for the normal backup, although the logs from when that backup was first created didn't show any errors. Is this a common problem going from a tape written by an LTO 5 drive to trying to write on the same tape with an LTO 6 drive? Or have we just been unlucky in the 2 or 3 that we've tried this with so far? Sorry if that was rambling on a bit, I just wanted to be as clear about the situation as I could. I'm hoping that we'll upgrade our server later this year and then be able to use the newest version of Retrospect but until then I have to find a way to make our current configuration work.