I have a drive that arrived with bad sectors. A quick test with RapidSpar assistant showed that both heads (0 & 1) tested 100% without error and that the drive looks to be 96% filled with data. After loading the file system, I can confirm that there is over 900GB of data on the drive. Selected to image used sectors with the balanced imaging setting and the drive reads at speeds bouncing between 125MB/second and 165MB/second. 20 minutes into the imaging process, over 150GB was cloned with only 16 unread sectors and still flying.
https://youtu.be/P-ezghWwgYc
The more I play with the RapidSpar Imager, the more I like it.