A500 GVP hard drive question

[duesi]

You mean the GVP Impact II Series ?
I also have one of them on my main A 500

Yes it needs a power-supply and you have to power on the GVP before the AMIGA.

Hope this helps

[duesi]

AFAIK you need the original psu.
but if you get the Voltages and the Pin-Layout
you can build one yourself...