# mount /dev/sdb1 /mnt
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error.

# btrfsck /dev/sdb1
ERROR: dev_item UUID does not match fsid: 5b66edf9-f8d8-489d-8ecf-fb601f42e79b != 47814679-712c-48e1-b470-5baebe95049c
ERROR: superblock checksum matches but it has invalid members
ERROR: dev_item UUID does not match fsid: 5b66edf9-f8d8-489d-8ecf-fb601f42e79b != 47814679-712c-48e1-b470-5baebe95049c
ERROR: superblock checksum matches but it has invalid members
No valid Btrfs found on /dev/sdb1
ERROR: cannot open file system

# btrfs-find-root /dev/sdb
No valid Btrfs found on /dev/sdb
ERROR: open ctree failed

# btrfs restore /dev/sdb  /run/media/BACKUP/
No valid Btrfs found on /dev/sdb
Could not open root, trying backup super
No valid Btrfs found on /dev/sdb
Could not open root, trying backup super
No valid Btrfs found on /dev/sdb
Could not open root, trying backup super

# btrfstune -u /dev/sdb1
ERROR: dev_item UUID does not match fsid: 5b66edf9-f8d8-489d-8ecf-fb601f42e79b != 47814679-712c-48e1-b470-5baebe95049c
ERROR: superblock checksum matches but it has invalid members
ERROR: dev_item UUID does not match fsid: 5b66edf9-f8d8-489d-8ecf-fb601f42e79b != 47814679-712c-48e1-b470-5baebe95049c
ERROR: superblock checksum matches but it has invalid members
No valid Btrfs found on /dev/sdb1
ERROR: open ctree failed

# btrfs fi sh
ERROR: dev_item UUID does not match fsid: 5b66edf9-f8d8-489d-8ecf-fb601f42e79b != 47814679-712c-48e1-b470-5baebe95049c
ERROR: superblock checksum matches but it has invalid members
ERROR: cannot scan /dev/sdb1: Input/output error