Warren Toomey's email address can probably be found through tuhs.org. He is the original author. Jonathan Engdahl's homepage shows his email address. His changes are explained at the page you linked. The 32MB limit arises due to the use of 16 bit block number fields in the protocol. There was a block number compression scheme in the source (may have been conditionally compiled, memory fades), but it didn't seem to work properly. I needed to read RD54 drives, so I committed a hack upon the thing, expanding the block number field to 32 bits. I had a bit of trouble with the first-boot stuff that vtserver toggles into ODT, so I hacked on that too. The windows side of this hacked version is completely untested. I never packaged this hack properly: no comments, no updates to the documentation, etc. But if it's useful, you can find it here: http://yagi.h-net.msu.edu/vtserver.drb.tar De