Bad magic number in super-block while trying to

ohsnoopy

引导启动检测过程出现以下提示：
Mount USB filesystem          [ok]
checking root filesystem
fsck.ext3 /dev/hda12:
    The superblock could not be read or does not describe a correct ext2 filesystem.If the device is valid and it really contains an ext2
filesystem(and not swap or ufs or something else),then the superblock is correct,and you might try running e2fsck with an alternate superblock:   e2fsck -b 8139 <device>;

   :Bad magic number in super-block while trying to open /dev/hda12.
Failed to check filesystem.Do you want to repair the error?(Y/N)
   (be ware,you can lose data)


1.选N，则提示CTRL+D可以normal start ，但是是立刻黒屏重启了，
2.选Y,出现提示输入密码进入主菜单，如下：
(repair filesystem)1#:
请问如何修复并能进入MDK桌面？