All Devices:
        Device: id = 1, name = /dev/sdb4

Before Recovering:
        [All good supers]:
                device name = /dev/sdb4
                superblock bytenr = 65536

                device name = /dev/sdb4
                superblock bytenr = 67108864

                device name = /dev/sdb4
                superblock bytenr = 274877906944

        [All bad supers]:

All supers are valid, no need to recover