On 2017-08-21 13:52:48 [-0600], Chris Murphy wrote: > On Mon, Aug 21, 2017 at 1:04 PM, Sebastian Andrzej Siewior > <sebastian@xxxxxxxxxxxxx> wrote: > > Hi, > > > > my understanding is that only metadata is protected by CRC in the new > > on-disk format. Are there any plans to also protect data? > > See dm-integrity, merged as of 4.12 kernel. I haven't seen any > performance benchmarking so far. So this ensures integrity with the help of crypto algorithms. This is a bit much as something like crc32c/crc64 would be sufficient. However dm-integrity does not provide a way to recover (as far as I can tell). My idea was that if the "normal" path is faulty (and noticed by the crc check) it (xfs or the dm layer) would try to read the data via an alternative path if possible (say on RAID1/5/6). Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
