RAID1 versus scheduled copy

Hey,

I'm planning to buy two 2TB drives, and at that point it's just getting too much data for me to use them without any kind of backup, so I initially wanted to build a RAID1 with them. However it seems RAID can lead to many problems so I was thinking I could just run daily copies from the master to the slave disk using rsync or whatever other solution (it'll run on windows, if anyone knows of a good incremental copy tool).

Would you have something against the copy method as opposed to the RAID ? Apart from the fact it's not an immediate copy and that if the master disk dies I lose the daily data that was put on it, but that's probably not too dramatic since it's a home machine.

Cheers

Okay I guess mounting the backup drive in an external bay would make more sense, so it can be turned on for backups and that's it, it's probably safer that way, just a tad more expensive.