When you use TeraCopy to read from a bad disk you can switch the bad disk off and once you turn it on again, TeraCopy will continue to copy where it has been interrupted. That is of course if your hard disks has similar problems than mine. It works basically, but get's stuck for some reason some times.
You can only turn on/off the disk from where you read. If you turn off the disk to where you write TeraCopy gets stuck and you will have to restart the whole copy process.