I’ve been researching backup systems for about a year now with the proliferation of disk-based footage. The Cache-A seems to be the best, but at a price-point that was too high.
I also was archiving all footage, projects, etc on single SATA drives, but it’s just too risky without redundancy. Here’s my interim solution until either the Cache-A becomes for cost-justifiable or another technology emerges.
I bought a Lacie 10TB ethernet-based Raid-5 unit for about $1200. I can reliably store/backup quite a bit of data, and if a drive goes down, I simple drop a new one in. If i need another 10TB, I get another ethernet cable, another unit, and simple plug it in.
Since it’s on the network, all computers can see it. It also has a web-based interfaced if you decide to use it that way. Again, this is an interim solution for me until the back-up market matures.