tune2fs -l /dev/sda1

tune2fs -l /dev/sda1
tune2fs 1.45.6 (20-Mar-2020)
Filesystem volume name:   <none>
Last mounted on:          /
Filesystem UUID:          d66c3266-59e0-4761-ba98-90b6c7bf5708
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery extent 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:              4685824
Block count:              18742528
Reserved block count:     0
Free blocks:              5986105
Free inodes:              4103267
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      1019
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8192
Inode blocks per group:   512
Flex block group size:    16
Filesystem created:       Wed Apr  8 14:49:11 2020
Last mount time:          Fri Dec 11 18:58:23 2020
Last write time:          Fri Dec 11 18:58:23 2020
Mount count:              1
Maximum mount count:      -1
Last checked:             Fri Dec 11 18:58:08 2020
Check interval:           0 (<none>)
Lifetime writes:          948 GB
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:       1055684
Default directory hash:   half_md4
Directory Hash Seed:      acc8c58b-777a-4fad-90f7-57f5cfe67fd7
Journal backup:           inode blocks
Checksum type:            crc32c
Checksum:                 0x6be211be