Checksum capabilities with btrfs on top of mdraid?

I want this feature after reading through this article, which includes a description of bit-rot, silent data corruption that traditional raid could miss - http://arstechnica.com/information-technology/2014/01/bitrot-and-atomic-cows-inside-next-gen-filesystems/#image-2

I figured that a btrfs volume with its snapshots and data protection would be a good target for backup. The "raid1" in the btrfs filesystem comes into play, because if the filesystem detects a checksum mismatch, during a normal read or a scrub, it can attempt to get a good copy of the data from the redundant store.

I'm pretty happy with the speed so far. Doing a large copy from the RN104 to a local client, getting ~70MB/s, so not full gigabit, but acceptable. I may go ahead and just mess around with it as you suggest, the RN104 is being added as a new device for secondary backup, so I can burn it down to test things out, before it is relied upon.