I have a had drive with many bad sectors. I used MHDD to erase it and scan+erasedelays. When I try to scan+remap it hits the first UNC sector and freezes with the screen garbled and switched to black and white. Is there something I can do to get MHDD to complete the scan+remap?

The drive sounds like it might be too sick for MHDD to cope with its behaviour. I can think of a way to attempt some of this process if you are comfortable using Linux, but I suspect you are wasting your time with such a drive (it may just misbehave differently when using Linux), since you are not fixing the reason for the unreadable sectors. Have you looked at the SMART data for the drive? What does that show?

Some members here report that they can refurbish/recertify drives, depending on the actual problem.

Well, Refurb. drives costs few $$$ compared to the actual price of the new one
repairing bad sectors takes some time and costs depends on hdd size

does it worth for u? or buy new one better?

Up2U

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

You can try to remap with Victoria for DOS, sometime it worked for me while MHDD failed.
But if you already erased the drive with MHDD and still have a lot of bad sector i agree with
Vulcan and think there's little to do with such tools.

SMART data may be helpful. Scanning with MHDD shows bads on regular pattern or you have
large zone with good sectors?

Half a screen of good, followed by half of screen of bad, then repeats...

The drive likely has bad heads...you are wasting your time.

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Luke
Recovery Force Data Recovery