Linux磁盤和文件系統管理(4)_文件系統屬性查看 修改

文件系統屬性查看及調整工具：   e2label命令：設置文件系統卷標，這樣避免格式化修改卷標     e2label 設備名稱  [Label]  

#查看分區卷標
[root@localhost ~]# e2label /dev/sdb1
mytest

#修改分區卷標
[root@localhost ~]# e2label /dev/sdb1 'labelNew'
[root@localhost ~]# e2label /dev/sdb1
labelNew

 

  tune2fs命令：顯示ext系列文件系統的屬性或修改其屬性     語法：tune2fs [option] 設備名稱     參數：        -l：顯示super block中的信息        -j：將ext2文件系統轉換為ext3文件系統，加入journal        -L ‘label’：類似e2label，分區卷標        -m #：調整預留給管理員的管理空間百分比        -O：文件系統屬性的啟動或關閉               [^]feature[,...]         -o：文件系統默認掛載選項的啟用或關閉                [^]mount-option[,...]         man tune2fs查看詳細的參數     示例：  

[root@localhost ~]# tune2fs -l /dev/sdb1
tune2fs 1.42.9 (28-Dec-2013)
Filesystem volume name:   labelNew ------->卷標
Last mounted on:          /mnt/test3 ----->掛載點
Filesystem UUID:          e238f3ae-863c-473e-a1ca-35b1e0a69de2
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 uninit_bg dir_nlink extra_isize
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl ----> 默認掛載選項
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              65536
Block count:              262144
Reserved block count:     13107
Free blocks:              249189
Free inodes:              65524
First block:              0
Block size:               4096
Fragment size:            4096
Group descriptor size:    64
Reserved GDT blocks:      127
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8192
Inode blocks per group:   512
Flex block group size:    16
Filesystem created:       Tue Sep 15 05:53:15 2015
Last mount time:          Tue Sep 15 17:07:02 2015
Last write time:          Tue Sep 15 17:59:21 2015
Mount count:              9
Maximum mount count:      -1
Last checked:             Tue Sep 15 05:53:15 2015
Check interval:           0 (<none>)
Lifetime writes:          49 MB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:              256
Required extra isize:     28
Desired extra isize:      28
Journal inode:            8
Default directory hash:   half_md4
Directory Hash Seed:      45da449e-ad33-4a49-9660-1469a94cc2f8
Journal backup:           inode blocks

#修改默認掛載選項：啟用journal_data
[root@localhost ~]# tune2fs -o journal_data /dev/sdb1
tune2fs 1.42.9 (28-Dec-2013)
[root@localhost ~]# tune2fs -l /dev/sdb1
....
Default mount options:    journal_data user_xattr acl
....

       dumpe2fs 命令：顯示 ext2/ext3/ext4 文件系統信息       語法：dumpe2fs [option] DEVICE       參數：         -h: 僅顯示超級塊信息；         -b：顯示壞塊信息         -x：顯示詳細的組信息   示例：  

[root@localhost ~]# dumpe2fs -x /dev/sdb1
dumpe2fs 1.42.9 (28-Dec-2013)
Filesystem volume name:   labelNew
...super block 信息...
Journal start:            0
Group 0: (Blocks 0x00000000-0x00007fff) [ITABLE_ZEROED]
  Checksum 0xba41, unused inodes 8180
  Primary superblock at 0x00000000, Group descriptors at 0x00000001-0x00000001
  Reserved GDT blocks at 0x00000002-0x00000080
  Block bitmap at 0x00000081 (+129), Inode bitmap at 0x00000091 (+145)
  Inode table at 0x000000a1-0x000002a0 (+161)
  28521 free blocks, 8180 free inodes, 2 directories, 8180 unused inodes
  Free blocks: 0x0000008e-0x00000090, 0x00000099-0x000000a0, 0x000010a2-0x00007fff
  Free inodes: 0x0000000d-0x00002000
...組信息...