This is to "move" the captioned posting from the general Defraggler forum to this one.
Reported issues are as follows:
1) Sequential defragmenting results in distorted pattern on second drive. When the operation is repeated on the second drive directly, the defragmentation pattern cleans up. On this same general subject, realized that a repeat defragment on the same drive without restarting the program results in a distorted operation. Closing and restarting the program resolves the odd behavior. If I had to guess, there is an issue with housekeeping cleanup after one operation leading into a second. This suggests that as workaround until known good, Defraggler needs to be used as a one-shot defragmenter and then restarted before next operation.
2) The time-to-complete projection on a half-full WD 4TB USB drive (tried for grins) initially is maybe several hours. Defraggler runs for a while, then bumps the time-to-complete to ">1day", and keeps chugging along forever with that projection. As a casual comparison, then tried AusLogics free defragmenter on the same drive. It projected maybe several hours to complete, then chugged along to completion as projected. Don't know if the operations were essentially the same, or the related quality and thoroughness to the extent they enter into the picture, but seems like reasonable behavior by the other program.
Am on a Dell laptop running updated Win 7 32-bit.
Regards,
George