很久很久之前家裡買了一台播放機然後買了一粒2TB的硬碟，之前都拿來下載BT種子，後來拿來備份家裡手機裡錄的影片，之前有一次硬碟就怪怪的，重format 一次之後，資料全消失就好了。但是現在存了太多重要的資料，所以要備份出來。
我家現在沒有Windows作業系統，透過VirtualBox 裡的 Windows 的 VM 無法讀取host (Mac OS X) 裡的 USB 裡 NTFS 格式硬碟。所以能直接在Ubuntu 裡去修復 NTFS 格式硬碟。
透過把 SATA 轉成 USB 插到NB上，Ubuntu 顯示這個錯誤訊息：
Error mounting: mount exited with exit code 13: $MFTMirr does not match $MFT (record 1). Failed to mount '/dev/sdb1': Input/output error NTFS is either inconsistent, or there is a hardware fault, or it's a SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows then reboot into Windows twice. The usage of the /f parameter is very important! If the device is a SoftRAID/FakeRAID then first activate it and mount a different device under the /dev/mapper/ directory, (e.g. /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation for more details.
解法出乎意料的簡單，使用指令：
ntfsfix device
醬子就修理好了。
Install ntfs-3g with sudo apt-get install ntfs-3g. Then run the ntfsfix command on your NTFS partition.
ntfsfix v2.0.0 (libntfs 10:0:0)
Usage: ntfsfix [options] device
Attempt to fix an NTFS partition. -h, --help Display this help -V, --version Display version informationFor example: ntfsfix /dev/hda6
Developers’ email address: [email protected] Linux NTFS homepage: http://www.linux-ntfs.org
Note: Whenever you’re dealing with partition, make sure that you have a complete backup just to be on the safe side.
sudo apt-get install testdisk
Then run it:
sudo testdisk
and follow the instructions. You must search for partitions and then write the changes.
Thanks to answerers here:
資料來源：
Unable to mount NTFS external hard drive
https://askubuntu.com/questions/500647/unable-to-mount-ntfs-external-hard-drive