fsck修复磁盘的例程2

异常：UNEXPECTED INCONSISTENCY:RUN fsck MANUALLY

场景说明：CentOS修复启动时根分区超级块错误的方案

    Check filesystems

_Centos-6.5-x86_:Superblock last mount time 

_Centos-6.5-x86_:UNEXPECTED INCONSISTENCY:RUN fsck MANUALLY

                 (i,e,without -a or -p options)

                                                    [FAILED]

*** An error occurred during the file system check

*** Dropping you to a sheell:the system will reboot

*** when you leave the shell

Give root password for maintenance

(or type Control-D to continue)

解决思路过程：

1. in blur, can not pay much attention to the error log info, just want to install once again

2. Now translate error info into Chinese : 检测文件系统的时候出现异常错误，提供控制台，当退出控制台的时候将会重启系统，键入密码进行维护****

3. Ok，now you have noticed how to get a shell to manintenance the filesystem 

   输入密码回车

4. df ,查看到当前的根文件系统已经挂载

5. 怎么知道是根文件系统is broken,at the beginning ,I try to repair another data disk partition /dev/sdb1

   Howerver ,even though reboot system ,occur the same problem once again.

6. try to umount root filesystem and fix it 

   umount /dev/sda2

   But ,it is stubbon,I can not get rid of it from mounted point.

7. Give up all the considerations

8. fsck /dev/sda2

   as a result ,the same problem occured once again

9. I doubt that it is not only /dev/sda2 partition ,but also /dev/sda1 

   fsck  /dev/sda1 

10. Yeah ,I got it