On Sat, Mar 30, 2019 at 5:43 PM Glenn Trigg <ggtr...@gmail.com> wrote: > > Hi Chris, > > Thanks for replying. > > On Fri, 29 Mar 2019 at 13:27, Chris Murphy <li...@colorremedies.com> wrote: > ... > > Seem in conflict. I don't really understand how the kernel complains > > about a bad super and yet user space tools say they're all OK. What > > happens if you try: > > > > # mount -o ro,nologreplay,usebackuproot > > I got essentially the same results... > > % mount -o ro,nologreplay,usebackuproot /dev/sda1 > mount: /data: can't read superblock on /dev/sda1.
I'm confused because "can't read superblock" isn't found in fs/btrfs. I'm only finding it in fs/gfs2/ops_fstype.c >From what you provided, /dev/sda1 definitely has a valid btrfs superblock. I wonder if there's some other stale something or other on this partition? What do you get for $ sudo blkid $ sudo wipefs -an /dev/sda1 $ sudo mount -v -o ro,nologreplay,usebackuproot -- Chris Murphy
