Uh...... the 512 byte empty SBR is just a 512 byte file with zeros... you can create one with any binary editor program or in linux, with /dev/zero.Thanks for the response.
Where does one acquire the 512byte sbr file, I would love to apply this overwrite and see what my results are. When you are referring to backup copy, if I had said 512byte sbr file it would erase this backup. Or is the backup something that I need to somehow not trigger when the pci bus reinitializes the card?
on all the SBRs I've seen, there's a duplicate copy of the data, I assume that's a backup. both primary and backup are contained within the SBR, so if it is 256B SBR, and you write 0's to those 256B, then the backup copy is gone too. But if you write 256B 0's to a 512B SBR, what I'm saying is that it is likely the backup copy still exists, depending on how data is organized.