On Sun, Dec 27, 2015 at 6:21 PM, Christoph Anton Mitterer <cales...@scientia.net> wrote: > On Sun, 2015-12-27 at 07:22 +0000, Duncan wrote: >> I'd call that NOTABUG. As the btrfs-scrub manpage suggests: >> >> * When you point scrub at a mountpoint, it scrubs all devices >> composing >> that filesystem. > Uhm,.. mine doesn't contain this,... neither do those of the master or > devel branches from David's repo... or am I just blind? > > Actually it says: >>DESCRIPTION >> btrfs scrub is used to scrub a btrfs filesystem, which will read all >> data from all disks and verify checksums. > > Also, if it would allow to only selectively scrub parts of the fs (e.g. > just some devices or subpaths/subvols/files) than the whole syntax for > cancel, break, etc. would become ambiguous. > >> Since /dev/disk/by-*/* are symlinks to various block-device nodes, >> it >> follows that if you point scrub at them, only the device pointed at >> is >> scrubbed, exactly as one might expect based on the manpage. > Sure... that was clear... but I have another manpage than yours... > perhaps some distro specific patch?
Fedora carries pretty much unmodified upstream btrfs-progs and I see what both of you are seeing (I have 4.3.1). The description does somewhat confusingly say "btrfs scrub is used to scrub a btrfs filesystem, which will read all data from all disks and verify checksums" but under subcommand > start it contains the following qualification as the first sentence: Start a scrub on all devices of the filesystem identified by <path> or on a single <device>. -- 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
