I caught a virus a couple of weeks ago and eventually XP would not reboot in any mode. I had a lot of data on my laptop's hardrive I wanted to save, so I booted up with my Knoppix CDROM and tried to dump the data to a Western Digital Portfolio USB hardrive. Eventually, after rebooting a few times, changing read/write permissions, unplugging and replugging the drive, etc., I got Knoppix to recognize the drive and dump to it. Now, after re-installing XP, I can't get the drive to be recognized on Linux or windows.

I keep getting this error message in Knoppix:

"Could not mount device
error:
mount: I could not determine the filesystem type, and none was specified."

Is there a way I can change the filesystem type manually, or any other way to get the drive recognized? Somehow I got it recognized before, but I am pretty unfamiliar with Knoppix.