I have a very similar situation, I would like to turn off hard drive A. with Windows installed &at the same time. Turn on hard drive B with Linux installed.Could this be accomplished with a double pole double throw switch? I know it would be absolutely critical to power down the system before making the switch. I am using a specially customized version of Linux & and making the one drive master and the other the slave is not an option in this particular case. If anybody has any good ideas that would be happy to hear them.