On 2019/9/22 下午2:34, Felix Koop wrote: > Hello, > > I need help accessing a btrfs-filesystem. When I try to mount the fs, I > get the following error: > > # mount -t btrfs /dev/md/1 /mnt > mount: /mnt: wrong fs type, bad option, bad superblock on /dev/md1, > missing codepage or helper program, or other error.
dmesg please. > > When I then try to check the fs, this is what I get: > > # btrfs check /dev/md/1 > Opening filesystem to check... > No valid Btrfs found on /dev/md/1 > ERROR: cannot open file system As it said, it can't find the primary superblock. Please provide the following output. # btrfs ins dump-super -fFa /dev/md/1 And kernel and btrfs-progs version please. Thanks, Qu > > Can anybody help me how to recover my data? > >
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