$ sudo dumpe2fs /dev/sdb1

dumpe2fs 1.45.6 (20-Mar-2020)
Filesystem volume name:   VMS
Last mounted on:          /VMS
Filesystem UUID:          fce521c7-e2ce-414a-8a7e-e2311640802f
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery extent 64bit flex_bg \
sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linuxxf .
Inode count:              14352384
Block count:              57388288
Reserved block count:     2869413
Free blocks:              22270800
Free inodes:              14352217
First block:              0
Block size:               4096

  Block bitmap at 1056 (bg #0 + 1056)
  Inode bitmap at 1072 (bg #0 + 1072)
  Inode table at 1599-2110 (bg #0 + 1599)
  415 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
  Free blocks: 33822-33985, 34550-34691, 38803-38911
  Free inodes: 8193-16384
Group 2: (Blocks 65536-98303) csum 0xdde9 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1057 (bg #0 + 1057)
  Inode bitmap at 1073 (bg #0 + 1073)
  Inode table at 2111-2622 (bg #0 + 2111)
  0 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
  Free blocks: 
  Free inodes: 16385-24576
....
