Comment 1 for bug 800298

As discussed in original question , while handling large file on NT filesystem , the file may be corrupted and then lost.

If NTFS specification does not allow safe handling large files , option to use 2 files ( one is backup ) mirrored may be useful ( even if performance will be low ) !

If NTFS specification is not correctly implemented by Microsoft , we will decide separately.

If mounted NTFS volume is handled incorrectly by mount.ntfs process , it is a chance to fix.

As I am unsure , which of 3 possible causes is causing the problem , all 3 should be considered.