Well, as I said earlier, why have a low-level format option in your software if all you're going to do is a zero-fill? Some hard drives will allow low-level formatting, and others will not. The user will just have to try it on his drive and see what happens.
I know that the drives I used Disk Manager on exhibited the same symptoms mentioned by the guy who started this thread....Disk Manager low-level formattted them for me and then I was able to do a high-level format and re-install my OS (which was Windows by the way).
No one seems to question that the guy who started this thread low-level formatted his IDE drive ,so why is it such a huge stretch to believe that Seagate/OnTrack Disk Manager can also low-level format drives?
But I believe you are correct about newer drives. Manufacturers don't want end-users to be low-level formatting the drives. Causes too many problems and too many calls to the tech support line. The guy who started this thread must have an older drive...around 4 GB, so it wouldn't hurt to try one of the various tools out there to fix it.