ALEXANDRE ACKERMANS Ditto for corrupted disk after optimizing with drive genius on macbook Pro os x 10 5 6
I used it succesfully twice in the past, but after such a bad experience, I am extremely wary to try it again. Unfortunately the lost time+work on that problem will never be made up by any speed gains due to a succesful optimization.
To optimize, the most efficient and free techinque seems to boot from an external CD, create a disk image copy to an external drive, reformat and recover the disk image. This will copy all files as a contiguous, defragged block. No hassle no backup on the fly defrag seems too risky to try.
(Version 2.2)