Raid vs rsync -

[Bob Goodwin]

I had a mainboard fail in a box I use as a server, I moved the hard 
drive into old computer and carried on from there. Now I've replaced the 
board and intended to set it up using Raid to mirror two drives. However 
I have been wondering if it wouldn't work just as well to periodically 
rsync the drive in use with a second drive?

That seems a more direct approach and I could easily check to make 
certain that the second drive was a usable copy, insurance against loss 
of data.

Am I going wrong somewhere in my thinking?

Bob