Check to see if the drives shows up in "Disk Management"
start/computer/right-click/choose manage/choose "disk management" in left pane.
Should show are drives in the machine. Right click on the drive in question, ans see what options it shows.
You MAY have to reformat this drive too, but I think not if it was used before.
If it is a new drive, Windows won't see it until it's formatted.