显示状态命令dumpe2fs的示例如下:
[root@localhost ~]# dumpe2fs /dev/sda3
dumpe2fs 1.41.12 (17-May-2010)
Filesystem volume name:
#卷标名
Last mounted on:
#挂载点
Filesystem UUID: c2ca6f57-b15c-43ea-bca0-t239083d8bd2
#UUID
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has Journal ext_attrresizejnode dirjndex filetype
needs_recovery extent flex_bg spars
e_super large_file huge_file uninit_bg dir_nlink extra_size
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
#挂载参数
Filesystem state: clean
#文件系统状态，正常
Errors behavior: Continue
Filesystem OS type: Linux
I node count: 1826816
#inode总数
Block count: 7300864
#块总数
Reserved block count:365043
Free blocks: 6634637
Free inodes: 1753533
First block: 0
Block size: 4096
#块大小
Fragment size: 4096
Reserved GDT blocks: 1022
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Flex block group size: 16
Filesystem created: Mon Nov 12 22:30:41 2012
Last mount time: Tue Apr 9 23:53:29 2013
Last write time: Mon Nov 12 22:45:55 2012
Mount count: 3
Maximum mount count: -1
Last checked: Mon Nov 12 22:30:41 2012
Check interval: 0 ()
Lifetime writes: 3199 MB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
#inode的大小
…省略部分输出…
Group 0: (Blocks 0-32767) [ITABLE_ZEROED]
#第一组的内容
校验和0xcb85，817外未使用的inode
主 superblock at 0, Group descriptors at 1-2
保留的GDT块位于3-1024
Block bitmap at 1025 (+1025), Inode bitmap at 1041 (+1041)
Inode 表位于 1057-1568 (+1057)
23513 free blocks, 8179 free inodes, 2 directories, 8179个未使用的 inodes
可用块数：9255-32767
可用 inode数 14-8192
…省略部分输出…
