# tune2fs -l /dev/sdb1
tune2fs 1.47.0 (5-Feb-2023)
Filesystem volume name:   <none>
Last mounted on:          /
Filesystem UUID:          400fce9d-26ad-49f5-bf01-520d6638b25f
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr dir_index filetype needs_recovery extent 64bit flex_bg sparse_super large_file huge_file dir_nlink extra_isize metadata_csum
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              305184768
Block count:              4882930432
Reserved block count:     244146521
Free blocks:              3380141687
Free inodes:              298118738
First block:              0
Block size:               4096
Fragment size:            4096
Group descriptor size:    64
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         2048
Inode blocks per group:   128
Flex block group size:    16
Filesystem created:       Sun Mar 26 18:09:43 2023
Last mount time:          Sat Mar  9 01:53:05 2024
Last write time:          Sat Mar  9 01:49:09 2024
Mount count:              1
Maximum mount count:      8
Last checked:             Sat Mar  9 01:49:09 2024
Check interval:           2419200 (4 weeks)
Next check after:         Sat Apr  6 01:49:09 2024
Lifetime writes:          11 TB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               256
Required extra isize:     32
Desired extra isize:      32
Journal inode:            8
First orphan inode:       141034938
Default directory hash:   half_md4
Directory Hash Seed:      fc6c6d15-58cc-40f8-9715-ba2dcdfe235c
Journal backup:           inode blocks
Checksum type:            crc32c
Checksum:                 0x187cbde6