There is a cool little trick to get the status of a dd operation out of the system. It will provide the status of dd via the err interface. You can do this one of two ways, either background (bg) the operation or perform it in a new terminal or screen.
For OpenBSD, a SIG_INFO (INFO) needs to be passed to the dd process:
pkill -INFO dd
For Linux, a SIG_USR1 (USR1) needs to be passed to the dd process:
pkill -USR1 dd Continue reading