Simon,
If your drive is in fact corrupt and unusable, simply reformat it. Yes, it will remove all the data contained, but if you can't use it, nothing is lost. If the drive formats them the drive is mechanically sound and should be back to it's old self.
Cigar box can be placed on any drive you choose, and in fact could be installed multiple times using different paths/directories/drives.
There is no need to go inside the case unless you want to add (or subtract) a drive.
Henry
Misty Moorings Team