Centos 6.5版本，df -h出來的容量與du -sh的容量不對應是怎麼會事呢？

問題如題，df -h 出來的容量與du -sh 查看的容量信息不一樣，是那裡出了問題了嗎？

下麵分別是du -sh *與df -h出來的結果

[root@mail /]# du -sh *
6.2M    bin
22M    boot
172K    dev
29M    etc
165G    home
130M    lib
26M    lib64
16K    lost+found
4.0K    media
4.0K    mnt
4.0K    opt
du: 無法訪問"proc/9139/task/9139/fd/4": 沒有那個文件或目錄
du: 無法訪問"proc/9139/task/9139/fdinfo/4": 沒有那個文件或目錄
du: 無法訪問"proc/9139/fd/4": 沒有那個文件或目錄
du: 無法訪問"proc/9139/fdinfo/4": 沒有那個文件或目錄
0    proc
0    result.txt
201M    root
15M    sbin
4.0K    selinux
4.0K    srv
0    sys
40K    tmp
6.3G    usr
349M    var
[root@mail /]# df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root   50G   44G  3.4G  93% /
tmpfs                         2.4G     0  2.4G   0% /dev/shm
/dev/sda1                     485M   32M  428M   7% /boot
/dev/mapper/VolGroup-lv_home  586G  165G  392G  30% /home
[root@mail /]# cat /etc/redhat-release 
CentOS release 6.5 (Final)
[root@mail /]# 

以上是相關查詢命令的輸出，下麵是硬碟fdisk -l的輸出信息

[root@mail /]# fdisk -l

Disk /dev/sda: 536.9 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00014e84

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64       65271   523774976   8e  Linux LVM

Disk /dev/sdb: 161.1 GB, 161061273600 bytes
255 heads, 63 sectors/track, 19581 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/mapper/VolGroup-lv_root: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/mapper/VolGroup-lv_swap: 5217 MB, 5217714176 bytes
255 heads, 63 sectors/track, 634 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/mapper/VolGroup-lv_home: 638.5 GB, 638494703616 bytes
255 heads, 63 sectors/track, 77625 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

[root@mail /]# 

之前也使用 badblocks 進行掃描了下，壞的塊為0。

實在是找不出來相關的原因了，遂發出來希望路過的大神指點一下。

在此步驟之前也曾懷疑是否是因為有刪除文件而沒有釋放出來而導致的，然後刪除了一些文件，容量間也會直接減少，也有進行重啟過伺服器，小弟菜鳥。在發貼期間仍也會不停的自已進行尋找答案。

謝謝！