Burngate wrote:He's NOT powering the HDD from the Pi: the power is going into the GPIO 5v pin, and in parallel to the HDD
Also, because of that, the input poly-fuse isn't in circuit, so that's not the problem.
Its not a problem, unless you have a short in the PI
, or the over-voltage protection diode D17 triggers, then you have a major problem
, as your PI will burn out!
you bypassed the PI's polyfuse (which is an unnecessary operation as well if you directly power the HD).
You should always power the PI through its micro_USB port, as powering through the GPIO bypasses the PI's polyfuse and leaves it unprotected.
You current solution seems to be in two minds how to go about.