fujimax wrote:
Manufacturer's zero fill programs are probably a good bet.
I use MHDD for this function but then i don't put repaired drives into the market.
I copy movies and mp3's in the repaired drive (as many as possible) under Windows (UDMA mode), not DOS. It is much faster than zerofill and MHDD because they use PIO mode. After that I make a full scan by MHDD and evaluate the readability of the drive. If it is fine I run the manufacturer's diagnostic program. If the drive passes all tests I put it on the market.