Any halfway experienced storage engineer is fluent in ECC. You don't need secret sauce from Facebook. That said, because of the first statement, a lot of today's storage solutions will use ECC on the backend if they present you with a logical FS. So you may not (should not?) need to reinvent this wheel. At Facebook's scale this absolutely makes sense, but they're not particularly breaking new ground here. Look at RAID 6 if you need more evidence.
I'm still figuring all of this out, thanks for the headsup. I realize Facebook don't have anything particularly interesting, but now I understand just how standard this is, huh.
