I did get about 10 2xx errors. I'm dumping the entire 512 again to make sure those are just bad blocks and not a bad read. I have read we don't need to dump the entire 512, but I'm doing it anyway as this is the first console that's given me trouble, so I'm going to dump it a bunch of times.
The only way to check if you have a good Nand dump is to dump it 3 times and compare, they should all be the same and the image should be readable with the diverse tools(don't know if they all support 512MB now).
Right. I am dumping the full 512 a second time. If I get the same errors in the same location then I'll do a 3rd dump of just the range where those back blocks are located.
For all the past 360 I've dumped/written, I had done 2 dumps and they had always matched, so I moved forward. They were all 16 meg nands through. This is my first 512 and my first problems, so like I said I'm going to do a bunch of dumps. Hopefully it'll just end up being that bad ground I had.