I need the exact command line structure to do a fsck on an external usb HDD with a NTFS file system (BTW the system can't mount the drive, says there's MFT issue)

[compdoc]

> Then how have you ended up with an NTFS filesystem? I mean that with 
> some sincerity - the obvious choice for a chkdisk utility is wherever 
> that volume came from. Have you any friends with Windows installs who 
> may be able to help?

I agree: if the data is critical use an OS that runs NTFS natively. Use
their tools to repair it - no one does NTFS better than Microsoft.