Originally Posted by Rob Helmerichs
OK, I typed this, and now I have a blinking cursor on the next line. Is that all I'll see until it's done? Or has something gone wrong?
Yes, that's all you'll see. Progress feedback is for weenies :-) You should see your disk lite flashing away actively.
In my experience, with DMA enabled and source and target disk on different ide chanels, you should get ~ 1-2GB/min, so a 40 GB disk, for example, might take 40 minutes or so. If you are lucky, it might be done with a 40GB disk in 20 minutes. It can be much longer with dma disabled.
There's another variant/extension of dd called dd_rescue
. ddrescue does provide progress feedback, IIRC. It also does a better job of recovering from a failing source disk, copying what it can, and skipping over bad blocks. dd will just crap out when it hits a bad block.