ignatzatsonic said:
As far as I know, leaving other drives connected doesn't guarantee that some Windows files will end up on the wrong drive, but it is a common occurrence.

If you like to live dangerously and like to do things twice, you can take your chances.

I'd think you can also disable the other drives in the BIOS if you refuse to disconnect cables.
In many computers you can disable the drive SATA port in BIOS instead of detaching the drive (SATA or power cable).
Some computers (specially laptops) you don't have how to disable the SATA port in BIOS.