[planteen]

Turbo codes are typically soft decision codes, which don't make a ton of sense at the filesystem level, since there has already been a hard decision made. They are useful in storage at the read channel level, as in processing the analog stream from the head on the hard drive.

Reed-Solomon is often used in storage because it is an optimal erasure code - e.g., I know this block is missing or corrupt, correct it.

[bscphil]

> Reed-Solomon is often used in storage because it is an optimal erasure code

I was initially thinking OP might be talking about something like this, but I think I would have heard if all new hard drives had it built into their firmware to store error correcting codes alongside the real data and automatically fix bit flips, since I suspect that would have pretty serious performance impacts in certain cases and people would be complaining.