Suitable PSU for SATA interface+drives

Do you have size or other requirements that prevent you using a standard PC power supply?

Bob

Aren't most PC power supplies quite big? I'll be aiming at using a 1U height rack enclosure which will house the two drives, the interface board and power supply. It can't be very big. And how much current should the PSU give out at which voltages?

I don't have a pinout, but a connector which seems to be standard like the ones used for hard drives, CD-ROM units etc. is provided for the bridge board. It's color coded like this:

Yellow-black-black-red

That connector is what a 3-1/2" floppy drive has. Like a floppy, the bridge board uses only +5 volts. The SATA drives use +5 volts and +12 volts.

Not only that but external HD enclosures that yes, do use a dongle type "wall wart" PS (so what?) are very quiet and vibration free. They are also eSATA and USB capable. Great as a portable drive, or as in your case, a home made enclosure installation. As far as it having wall warts goes, whoopie doo, it's in your "rack enclosure", which should have power strips in it for powering the components or your "rack". Why would you even care? If you are making some kind of chassis that you can slide drives in and out of, then you should already know that your cheapest solution is to buy one of the power supplies you have been using for PCs.

You have way overcomplicated this.

There are 1u server chassis out there WITH STABDARD computer power supplies in them, that are meant to power a minimum of two hard drives, and a mother board. They can certainly handle your two hard drive scenario. they would also have the rear of the drive PS connectors in them already. Not only that, but they would have cooling fans, and mounting stations for the hard drives.

If you want quieter than that, then external enclosures are the only way to go. They beat that dead horse many moons ago.