don't have all of the details at hand for you, since its been awhile, and a lot of stuff is still packed away from a recent move. However, I was able to recover the contents of all but 1 of my tapes. The one I couldn't recover I think was an experiment to see how Microsoft's backup worked with the drive, so I don't think it had anything on it I didn't have anywhere.
I found that some of the versions of Onstream Echo, i.e. the newest versions, and versions from 1Vision wouldn't work with the DI30-VTC12. I remember trying various versions of the firmware until one of them "seemed" to work, but I only had success using MS/DOS-versions of the update firmware, and Ihad to dig trhough a lot of stuff on the Hastec site to find it....I think I came to the conclusion that I had little to lose, and just started trying different ones. I don't know if the firmware upgrade really did anything, or was needed.
Going against the install directions (which said that Echo had built-in drivers for the drive), and installing the drive using the Windows 2000 Professional add hardware facility and selecting one of the drivers did seem to work for me.
I think that initially, I was using a new tape to check-out if a configuration was going to work. Once the tape was reported as being blank, I would conclude I had a working configuration, and then attempt to read one of my tapes I was recovering from. Part of my problem was that I had tapes made with different versions of Echo, under different versions of Windows, and my tapes weren't labelled to tell me which they were made on. I don't have any experience using any Server versions of Windows.