How to read full disk once and monitor progress/speed on old Linux?

I have an old PC here and I want to check the HDD. I want to read it once completely into /dev/null. While doing this I want to see the speed. Because the PC is old I couldn't boot a recent Debian version. But I got Knoppix running. There is a lot of stuff on the CD but unfortunately dd does not support the status=progress option (because it's old) and pv is not installed. Any ideas? Knoppix version is 3.2.