以下より。
【Linux tune2fsコマンド】ファイルシステムのパラメータ設定をする
https://www.ricecake24book.com/linux-tune2fs-command/
[root@localhost localhost]# tune2fs -l /dev/sdb1
tune2fs 1.44.6 (5-Mar-2019)
Filesystem volume name: <none>
Last mounted on: <not available>
Filesystem UUID: cfe6a3f3-e4f0-4678-be28-429b2cab4770
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype sparse_super large_file
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 245760
Block count: 981248
Reserved block count: 49062
Free blocks: 947493
Free inodes: 245749
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 239
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Filesystem created: Thu Jul 23 15:03:22 2020
Last mount time: n/a
Last write time: Thu Jul 23 15:03:23 2020
Mount count: 0
Maximum mount count: -1
Last checked: Thu Jul 23 15:03:22 2020
Check interval: 0 (<none>)
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
Default directory hash: half_md4
Directory Hash Seed: 1f946b73-7dd9-4a28-8ae1-8b0979b83ecb
Journal backup: inode blocks
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