On 3 September 2013 18:54, Duncan <[email protected]> wrote: > > > In case the data is wrong, there may be a reverse CRC32 algorithm > > implemented. Most likely it's only several bytes which got "flipped". > ... > > But... that flips the entire reason for choosing direct-IO in the first > place -- performance -- on its head, incurring a **HUGE** slowdown just
Not wanting to put words in the original posters mouth, but I read that as an offline recovery method (scrub?), rather than real time recovery attempts. If the frequency of errors is low, then for certain purposes accepting, a few errors if you had a recovery option might be acceptable. As mentioned, nocow is probably best for VM images anyhow, but still :) -David -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
