On Fri, Sep 16, 2016 at 6:08 PM, Chris Murphy <li...@colorremedies.com> wrote:
> If -o recovery doesn't work, you'll need to use something newer, you
> could use one of:
> Fedora Rawhide nightly with 4.8rc6 kernel and btrfs-progs 4.7.2. This
> is a small netinstall image. dd to a USB stick, choose Troubleshooting
> option, then the Rescue option, then after startup use the 3 option to
> get to a shell where you can try to mount normally, or use
> btrfs-check. Limited tty, no sshd.
> https://kojipkgs.fedoraproject.org/compose/rawhide/Fedora-Rawhide-20160914.n.0/compose/Everything/x86_64/iso/Fedora-Everything-netinst-x86_64-Rawhide-20160914.n.0.iso.n.0.iso
> Or something more official with published hash's for the image and a
> GUI, Fedora 24 workstation has kernel 4.5.5 and btrfs-progs 4.5.2
> https://getfedora.org/en/workstation/download/

Just to complete the thought... use these just to boot and have access
to something newer. I'm not suggesting install them. First try a
normal mount, and if that fails, try -o recovery, if that fails, I'm
curious about

btrfs rescue super-recover -v <dev>
btrfs check <dev>

What I'm after is a way to get it to mount cleanly with a new kernel,
and then hoping you can then just reboot with the ancient kernel and
it'll be back to normal.

Chris Murphy
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