On Sat, Jul 23, 2016 at 8:03 PM, Tomasz Melcer <li...@exroot.org> wrote: > Hi, > > I've got a USB-connected HDD with a btrfs partition. The partition contains > a 1TB file, a disk image. The first `btrfs scrub` after writing that file > found 3 logical bad blocks that developed somewhere in the middle of that > file (logs below). > > The full area of the btrfs partition can be read without I/O error, so I > think there are two possible cases: either the data block was written > incorrectly or an incorrect checksum is stored. The first case is obviously > unrecoverable, but if it's the second case, fixing the problem should be as > simple as recomputing the checksum for what is already stored. > > How can I ask btrfs to recompute the checksum of a data block as it is > stored on the drive? I don't see any command doing an operation like that, > and I couldn't find anything on the topic on the internet.
Since btrfs-progs 3.17 'btrfs check --init-csum-tree' will create a whole new csum tree. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
