Check disk block size in Linux
首先,使用 df
或 lsbok
命令查看磁盘所在块设备名称
df -hT
output
Filesystem Type Size Used Avail Use% Mounted on
/dev/vda1 ext4 15G 2.1G 12G 15% /
tmpfs tmpfs 372M 0 372M 0% /dev/shm
看到虚拟磁盘为/dev/vda1
,然后,使用tune2fs
查看
tune2fs -l /dev/vda1 | grep "Block size"
tune2fs 1.45.6 (20-Mar-2020)
Filesystem volume name: <none>
Last mounted on: /
Filesystem UUID: 927497f9-eae9-4a2b-bd8b-162997d80076
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 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: 1770496
Block count: 7339472
Reserved block count: 366953
Free blocks: 5384282
Free inodes: 1576749
First block: 0
Block size: 4096
Fragment size: 4096
Group descriptor size: 64
Reserved GDT blocks: 243
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 7904
Inode blocks per group: 494
Flex block group size: 16
Filesystem created: Thu Oct 10 06:31:31 2019
Last mount time: Fri Feb 12 02:14:14 2021
Last write time: Fri Feb 12 02:14:10 2021
Mount count: 13
Maximum mount count: -1
Last checked: Sun Jan 17 03:21:58 2021
Check interval: 0 (<none>)
Lifetime writes: 5965 MB
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: 6649
Default directory hash: half_md4
Directory Hash Seed: 19cc95a6-03cd-4dc2-86d2-78b70b1bbbba
Journal backup: inode blocks
Checksum type: crc32c
Checksum: 0x1377592d
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