Whoa, crazy. I've never had that happen, and I've messed around with the drive quite a bit. Does the bike itself still boot up and run properly with the drive inserted? It would be even weirder if the bike thinks the drive is OK and your computers don't.
FYI you can still use the bike and run it without the logger drive inserted, it'll just display an error code the whole time.
Alternately you could use another drive -- did you ever make a backup of the drive's contents? I found that when I tried to use another USB device as a log drive, the bike would instantly error out unless I duplicated the entire folder structure of the stock Sandisk drive. You could put another drive in there with the same folder contents and it'd probably work.