[@DJ] Where do you see that it marks bad sectors? The descriptions here and on Macrorit’s web pages only say it “marks them in red”, presumably on the status display, so you can see where they are graphically. “Red” would mean nothing to the operation system or disk controller. The “chkdsk /f” command in Windows (command prompt as admin) looks like it will search for bad sectors AND flag them to prevent future use. “chkdsk /r” does that plus it attempts to recover any data from the bad sectors.
So Macrorit’s program is good if you want a nice display or want to see IF you have bad sectors, and don’t want to fix anything, or if you want to manually do something about any bad sectors found. A comment in another forum (sorry, I don’t remember which one) said it takes a LOT of work to manually block out sectors by creating partitions of good and bad areas. Then you have a bunch of new drive letters and a drive that is failing anyway. Much better to replace the drive if there are many bad sectors. Also, the disk controller should automatically map out bad sectors, replacing them with good sectors from a reserved pool of sectors, so if you see bad sectors at all, it may mean that pool is used up and drive is failing. To check this, look for a tool from your drive manufacturer to read the SMART data the controller writes to the disk.