Actually, the raid is based on a Promise raid controller. It's raid 1 with matched disks. It's only purpose is to provide off-cpu storage for physical security and (almost) assured availability of anything stored there. Because all the smarts are in the purpose-built card, the OS talking to it is less of an issue.

Of course, I have to make sure I put stuff there in the first place, but that's more a matter of discipline than technology.

I do have a home-made backup system I wrote several years ago that handled everything automatically. In those days, I was using Lantastic-Z (getting drivers for NIC's and getting them working was problematical back then) and manually synchronizing the drives. Files were a lot smaller then, too. It worked. I guess I should update it ... when I get around to it.