Re: I can't find FreeNAS in my repos...
From my experience running FreeNAS from a flash drive works best Just plug in an USB stick into some PC with big drives (preferably fast as well), install FreeNAS on that stick, create a fake RAID on all the disks in that PC (You will lose all the data from those disks) and you're good to go.
May be a bit harder than it sounds but still it (FreeNAS) has worked great for me so far. The biggest drawback is that it is recommended to use the UFS filesystem, which is not that great IMHO.
Box: Windows 7 / Windows XP | Intel Dual-Core E5200 | ATI Radeon HD4850 | 4GB RAM
Lap: openSUSE 13.1 / Windows 7 | Intel U7300 | KDE | Intel GMA 4500 | Asus UL80A | 3GB RAM