I am using 'dd' command to wipe a 320GB HDD and write 0's using Lubuntu 13.10 LiveUSB.

It has been 'more' than 3 days now and there is absolutely no hope the process will finish any time soon. The machine does response to anything as far as I can tell but I don't want to do anything and waste the 3 days of waiting.

My Q is: is this normal? I have done this before (not with 320GB though) and it never took all these days so what do I have to do? suggestions are highly appreciated.

Thank you!