On Aug 13, 2014, at 5:01 AM, David Pottage <da...@chrestomanci.org> wrote:

> At present, you can write RAID 5 or 6 data, but if anything goes wrong, btrfs 
> cannot use the parity information to help you get your data back, so in 
> general you are better off with RAID 1 or 10.

Btrfs RAID5/6 normally mounted will reconstruct data from parity if there's a 
data checksum mismatch indicating data block(s) are corrupt. It'll also 
reconstruct from parity in the case of degraded mounts, and when doing a 
balance. What's missing is scrub.


> Also, I don't think I/O done in parallel so you get no speed advantage from 
> having multiple discs either.

Hmm I thought that was just single and raid1?


Chris Murphy--
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