Are you saying that the software route would be best?
could you recomend any programs for win 7?
Eventually all mechanical hard disk drives fail, so to mitigate loss of data, some form of redundancy is needed, such as RAID or a regular backup system.
So you could alternatively do as Obi suggests, but I'm not sure that it would protect you against card controller (/motherboard) failing (or suffering from a power surge) as both drives are still connected to the same device, regardless of whether you're using RAID to mirror the drive automagically or a scheduled synchornisation of two separate drives.
With RAID1 you can take one of the discs and just use it as a normal drive, but you can't for any of the other RAID types.
seems to have something called Intel® Matrix Storage Technology which sounds interesting?