HD Clone 6 - hangs in Pass 2

I'm trying to clone a drive with multiple partitions with different file systems. The source and the destination drives are identical. The copy finishes the first pass, and then starts a "copying bad sectors, Pass 2 of 2", even though there were 0 read and write errors from the first pass. And basically, after a certain amount of time the procedure just hangs. I've done this twice, once with bit copy and once with smart copy, and the result is the same. I can find no documentation on the second pass, and both drives are fairly new and in good condition. The first time the progress bar said 100% when it hung, the second time 32%. the sector count continues to increment, and that's the only visible change over time. I waited 10 hours before stopping the first copy, (initial copy took about two hours).
Can anyone shed some light on what is going on?
Thanks
Can anyone shed some light on what is going on?
Thanks