`scrub(1)`, but resumable from an offset

I need to scrub a couple of very large HDDs. However, I can't do that from a desktop. I need to do it on the move, from a laptop. A single pass of scrub(1) on a HDD would take more than a day, but there is no way I can leave my laptop stationary for that long. scrub(1) itself doesn't support any kind of offset command line parameter. Is there a way to do what scrub(1) does (writing random bytes), but in a way that can be resumed? Basically the command would need to print out the offset when I interrupt it, and it needs to accept an offset parameter for resuming.