백업 ext4 슈퍼블록을 마운트하는 방법은 무엇입니까? 지침을 따르는 동안 오류가 발생했습니다. [중복]

실수로 ext4 파티션을 포맷한 후 해당 파티션의 내용을 복구하려고 합니다. Live USB에서 시스템을 실행하고 따랐습니다.이 가이드백업 슈퍼블록을 설치합니다. 그런데 설치하려고 하면 오류가 발생합니다. 이것이 내가 얻는 것입니다:

ubuntu@ubuntu:/$ sudo dumpe2fs /dev/nvme0n1p4 | grep -i superblock
dumpe2fs 1.45.3 (14-Jul-2019)
  Primary superblock at 0, Group descriptors at 1-31
  Backup superblock at 32768, Group descriptors at 32769-32799
  Backup superblock at 98304, Group descriptors at 98305-98335
  Backup superblock at 163840, Group descriptors at 163841-163871
  Backup superblock at 229376, Group descriptors at 229377-229407
  Backup superblock at 294912, Group descriptors at 294913-294943
  Backup superblock at 819200, Group descriptors at 819201-819231
  Backup superblock at 884736, Group descriptors at 884737-884767
  Backup superblock at 1605632, Group descriptors at 1605633-1605663
  Backup superblock at 2654208, Group descriptors at 2654209-2654239
  Backup superblock at 4096000, Group descriptors at 4096001-4096031
  Backup superblock at 7962624, Group descriptors at 7962625-7962655
  Backup superblock at 11239424, Group descriptors at 11239425-11239455
  Backup superblock at 20480000, Group descriptors at 20480001-20480031
  Backup superblock at 23887872, Group descriptors at 23887873-23887903
ubuntu@ubuntu:/$ sudo mount -o sb=32768 /dev/nvme0n1p4 /mnt
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/nvme0n1p4, missing codepage or helper program, or other error.
ubuntu@ubuntu:/$ sudo mount -o sb=98304 /dev/nvme0n1p4 /mnt
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/nvme0n1p4, missing codepage or helper program, or other error.
ubuntu@ubuntu:/$ sudo mount -o sb=23887872 /dev/nvme0n1p4 /mnt
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/nvme0n1p4, missing codepage or helper program, or other error.

내가 여기서 뭘 잘못하고 있는 걸까?