Originally Posted by
tfboy
I don't see why not. Although I have no experience of shuttles, you could put a small NAS-friendly OS on it and be up and running quickly.
As far as power consumption goes, I'd probably change the GeForce GPU for something a lot lighter. Does the shuttle have onboard graphics? If you wanted real low power, you could even consider removing the graphics card once it's set up.
As far as OS goes, you can go for any form of Linux, or something like FreeNAS which is basic but will serve you perfectly as a simple NAS file server.
I got a cheap copy of Windows Home Server (v1) for my HP Microserver as I wanted the convenience of a full Windows OS. The kind of OS you chose won't have much impact on the power consumption.
You can always get a power consumption meter and see what it's like. My Microserver is around 20-25W with 2x 2TB HDDs installed. IF the current idle power consumption is a lot higher, say about 40W, then you might want to consider a different platform altogether.
A compromise is to use standby / power off with WOL to bring it back up when you need it.