You think Steve would have been happy with that? Good to know though. Now when I get an error, I will take it to Recovery. Thanks again for valuable info.
Mac OS X 10.0 was Steve's baby so he was happy with it. The problem running against the boot drive is due to the fact things are constantly changing as the test is being run so it is inevitable that some data may change while it is being tested so instead of comparing A to itself it ends up comparing A to A' or even B thereby creating a false failure. Sometimes the test will be successful but there is an unavoidable finite probability of error. You cannot repair a mounted volume so you will have to boot from the Recovery Drive or another boot drive to make repairs if an error is found so why not do that in the first place and save steps and time?
