... Computer Management on the other hand, may work.
But then you're back to using either Device Manager (which doesn't do the business) or Disk management (which does the business but doesn't see the drive). Even if there is a drive letter collision, you should still see the physical drive in Drive Manager. I don't understand what's wrong. Maybe some Linux utilities would help but I lack the experience. But you're right. It's probably just some trivial problem. Looking on the web, a lot of users are complaining of the same problem and there doesn't seem to be a fix (with Windows). Maybe re-partition the drive with Linux?
Faced with the choice between changing one�s mind and proving that there is no need to do so,
almost everyone gets busy on the proof. -- J.K. Galbraith