NTFS signature is missing.Ubuntu下挂载磁盘问题

Linux  2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 16:20:31 UTC 2009 i686 GNU/Linux
$ sudo fdisk -l

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xbf5fbf5f

   Device Boot      Start         End      Blocks   Id  System
/dev/sda2   *           1       13687   109940796    f  W95 Ext'd (LBA)
/dev/sda3           13688       14594     7279064   12  Compaq diagnostics
/dev/sda5   *        3826       13687    79216515    7  HPFS/NTFS
/dev/sda6               1          10       80230+  83  Linux
/dev/sda7              11          72      497983+  82  Linux swap / Solaris
/dev/sda8              73         680     4883728+  83  Linux
/dev/sda9             681        3825    25262181   83  Linux

Partition table entries are not in disk order
----------------------------------------------
sudo mount -t ntfs /dev/sda5 /mnt/win
NTFS signature is missing.
Failed to mount '/dev/sda5': 非法的参数
The device '/dev/sda5' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
-------------------------------------------------------------

解决方法：

最后搞了个winpe，从U盘启动winpe，然后用磁盘精灵（ DiskGenius）扫描了一把，就ok了。