After some "googling" around, according to bug-track on nokia, http://bugreports.qt.nokia.com/browse/QTBUG-10337 , copy don't preserve creation/modification time, so I assume write either.
Right now I need to fall back to WinAPI SetFileTime and probably I would be better writing write function OS specific.
Can someone point me where can I find equivalent to the SetFileTime on Linux.