freenas "broke" my ntfs volume - Help needed to restore files

[Symbiot]

Hi

Was playing with freenas for the first time.
I made a backup of drive1 to a usb external.
I created a volume on drive1.
I then wanted to mount the usb-external into freenas so I could copy my files into freenas.
Apparently something went wrong...
The usbdisk did not mount properly.. gpt table rejected.
Now I cannot see the drive in windows. It is shown as RAW and wants to format.

Is there anything I can do.. either to restore the usb-drive or the zfs drive I created in freenas....

As you can imagine .. I NEED help... if you can help I'd really really appreciate it..

 

[devz3ro]

I would download partedmagic (http://partedmagic.com/doku.php?id=downloads) and use the 'fixparts' program (http://partedmagic.com/doku.php?id=programs) should do the trick