I do not know Linux.
I have an old Dell P-III 1GB RAM, running Windows Home Server.
It takes less than 30W sleeping, 50W idle, 70W full-blown activity ( In NYC, I can find similar computers with less memory in thrift shops for $50).
Oy can do a lot more than a simple NAS server.
Does not need any expensive RAID concoction.
If you have few Drives, (any kind any size can be mixed) it automatically make them appear as one drive called WHS.
Does auto mirroring and back up too.
Ready for HTTP and ftp servers has also self-signed certificate for SSL connection when needed. SSL is done through HTTPS and any Browser can use the connection secure No need for any additional security settings.
Provides Dynamic DNS "you_name.homeserver.com" that is registered free by Microsoft when you set up the server.
I.e. No need for Hamachi, Go to my PC, LogMeIn, DyDNS, or any other service that do you a favor, and can shift from free to pay, or partial pay when they want to..
Windows Home Server 120 days trial can be obtained from Microsoft for $5.99 shipping.
http://www.microsoft.com/windo...wshomeserver/eval.mspx