dumpe2fs -h /dev/md0
dumpe2fs 1.46.5 (30-Dec-2021)
Filesystem volume name:   <none>
Last mounted on:          /u2
Filesystem UUID:          9ae42448-8abd-4b45-a463-46a853ac1bed
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index fast_commit 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:              244170752
Block count:              1953351680
Reserved block count:     19533516
Overhead clusters:        15687051
Free blocks:              1822251995
Free inodes:              210549006
First block:              0
Block size:               4096
Fragment size:            4096
Group descriptor size:    64
Reserved GDT blocks:      1024
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         4096
Inode blocks per group:   256
RAID stride:              128
RAID stripe width:        640
Flex block group size:    16
Filesystem created:       Sun Apr 19 20:19:28 2020
Last mount time:          Thu May  2 10:35:47 2024
Last write time:          Fri May  3 18:11:45 2024
Mount count:              19
Maximum mount count:      -1
Last checked:             Mon Feb  6 10:15:27 2023
Check interval:           0 (<none>)
Lifetime writes:          4658 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:       207040039
Default directory hash:   half_md4
Directory Hash Seed:      2b54c5c7-e8e8-43a5-8461-ac9517f7a30e
Journal backup:           inode blocks
Checksum type:            crc32c
Checksum:                 0x3a8fae19
Journal features:         journal_incompat_revoke journal_64bit journal_checksum_v3 FEATURE_I5
Total journal size:       1024M
Total journal blocks:     262144
Max transaction length:   261888
Fast commit length:       256
Journal sequence:         0x0469fdf4
Journal start:            124831
Journal checksum type:    crc32c
Journal checksum:         0x2f54e2d9