I have an old Dell system with a Phenom II and 8gb of ram and two 8TB disks I could throw in there. I was thinking of using it for backup of sentimental and important data that currently resides on my Unraid server. I was hoping to implement some kind of system on a weekly basis that utilized WoL, backed up the desired shares and then put the system back to sleep. The system will be onsite in another building but not necessarily readily accessible. I know I could setup another Unraid machine but I was hoping for something FOSS since I'm not looking to spend money but want to put the hardware to use.
What OS would you recommend? For what reason?
Should I use Raid 0 or 1? Why?
Recommended workflow/software to implement the backup?