Electronics Help (Molex Switch)

[gibb]

I have a 50gb SSD which is fine for 90% of the time my PC is on so I decided to try and switch my 500gb HDD so I could reboot my PC and hard switch on or off the SATA drive with my games and large data on.

I purchased a molex switch which appears to pass through the red and yellow and switch the black which I believe is ground. Testing it with a molex fan it works fine.

However when I then attach a sata adaptor to the molex out of the switch my HDD spins up regardless or the switch position.

Any ideas why this isn't working? I cant see how the HDD is spinning when the switch (hence black wires) are broken.

Thanks

 

[jamesfreddie]

Probley because you are still running 5V through the HDD

 

[RobFromTheWood]

just checked a drive and the 0v on the power connector is connected to the case and the data connector

so the drive will still be connected to 0v you will need to switch the 12v and 5v to stop the drive from being powered