On Mar 14, 2013, at 4:10 PM, Roman Mamedov <rm@xxxxxxxxxx> wrote: > > - shouldn't the reads have been quietly satisfied my md3 from sdf1, instead of just passing the buck^W error > due to unreadable sdg1 to the higher (filesystem) layer? What distro kernel and version? Since you're not using btrfs raid1 there isn't a second copy maintained by btrfs itself, so it can't fix this. It's reporting a checksum failure for the single copy of data on the md raid1. It is getting the data elsewhere but it's btrfs saying that the checksum doesn't match. Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html