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Thread: Infectus Nand Flashing Guide

  1. #21
    Retired WiiHacks Staff Krafter's Avatar
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    Is your drive light flashing or is it staying on solid? It should flash once and your DVD drive should spin up. And make sure you have your bluetooth and WiFi modules attached to the board.
    Last edited by Krafter; 01-30-2011 at 08:15 PM. Reason: r button doesnt work on my KB at times :p

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    Ok few information about my setup, I am just experimenting with this for now, guide me if I am doing something wrong or correct:

    First, I removed the nand chip and use a TSOP adapter. I believe all my wirings are correct as the xavbox is able to detect nand id correctly.
    I also made a full nand backup from the chip (I made it twice and both came up with the same MD5 filehash values), so I think the reading of data portion is okay!

    I also made a test to erase the nand contents using the erase function, it seemed it was erased as there were no errors.

    Now I want to test the write function, by writing back the nand backup I made earlier.
    But when I write back the same data from the backup I made earlier, I got the bloc 0 error.
    So now I re-fitted the nand chip to the adapter (maybe a contact issue afterall), and I can now get past the Bloc 0 error.

    But this time, using compare and update, then write, I am getting a lot of blocs are different? are these considered errors?
    or are they normal since the data on the nand are now empty (since I erased the contents) and my backup nand contains data which makes them different?
    or something is wrong with my connection now?

  3. #23
    Retired WiiHacks Staff Krafter's Avatar
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    When you flash data blocks to your nand then when you read them back they should match exactly. If they don't then you probably have a bad connection or dirty pins on the chip. Sometimes you can see the problem pins on the nand as they will be a brownish color. Once you have it clean you shouldn't have any issues. This is probably one of the most common problem areas when doing this.

  4. #24
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    Quote Originally Posted by Krafter View Post
    Is your drive light flashing or is it staying on solid? It should flash once and your DVD drive should spin up. And make sure you have your bluetooth and WiFi modules attached to the board.
    drive is flashing one time, bluetooth and wifi module are connected.
    can not even come into rescue menu.

  5. #25
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    Ok I tried cleaning it, I still have the Bloc is different message on almost all blocs, so I stopped the writing.

    But I tried to experiment further, I re-flashed it one more time, and this time the message no longer appeared, upto the last bloc where I pressed stop. and then the message appears again from that part...

    example.
    1st run, write backup from bloc 0 to 4095. I get errors saying bloc is different from bloc 0 to bloc 100, then I press stop. I then re-flashed it 2nd time still from bloc 0 to 4095, and there are no more errors from bloc 0 to 100, once it reaches bloc 101, the error comes out again.

    so what I am saying is, what probably works for me right now, is to first write the backup to the chip even if there's a message saying bloc is different, and then just do a 2nd round of writing, and hopefully it will write successfully. Only it's time consuming, and I'm not sure it will pass without error all the way, since I just tested a few blocs for testing purposes.

    What do you think is the problem?




    Quote Originally Posted by Krafter View Post
    When you flash data blocks to your nand then when you read them back they should match exactly. If they don't then you probably have a bad connection or dirty pins on the chip. Sometimes you can see the problem pins on the nand as they will be a brownish color. Once you have it clean you shouldn't have any issues. This is probably one of the most common problem areas when doing this.

  6. #26
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    if you purposely erase the nand followed by a compare & update, you may get error prompted.
    logically.....

  7. #27
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    compare and update means it will check block 0 on the nand (which is erased) against what you have loaded from nand.bin, obviously this will be different so it will write the block, then compare the write was ok.

    Long as the software doesnt stop writing with "compare failed" then its working ok, the "block different" is correct and just means that block needed writing.

  8. #28
    Junior Member streamlinehd's Avatar
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    @Zolotor - As Bad_Ad said, this is normal and isn't a compare error. It's just telling you that block was different and is being overwritten. It re-writes the data, compares it and moves on to the next block if the compare is good. If the compare is bad the process will halt completely.

    As explained in this part of the guide:

    6. Now choose the Update and Compare write option and press Write. If all the blocks write to the NAND successfully without a compare error, you are good to go and this test was successful. If you do have a compare error and the write fails, see the troubleshooting section of this guide and do not continue!!.

    IMPORTANT: A different block message (e.g. block 1 different) in the results window is not a compare error. A compare error will end the writing process at the block that didn't write/compare properly.


    Step 6 – Flashing The NAND

    @blackeye You need to do a full flash. Did you do a full flash and did you do an update and compare?
    Last edited by streamlinehd; 01-31-2011 at 07:22 AM.
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  9. #29
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    Ok, thank you all for clearing that up, so that's not an error after all.

    Now I came across another problem. Somewhere along the writing, I get a bloc update failed error.

    example:
    writing from bloc 0 to 4095
    i get an error on say bloc 508 and the writing stopped.

    What does this mean? does this mean the bloc 508 is a bad block? so can i still continue by skipping that bloc, and start writing from bloc 509 upto 4095 again.
    or it will be useless since I already have a failed write in bloc 508.

  10. #30
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    Yes, its probably a bad block.

    Usually when you write a bad block, you usually write back the same data so it passes the verify. However, sometimes writing to the block causes it to change slightly and it will fail.

    Just do what you said and you should be fine, this happens VERY rarely but is nothing to worry about.


    To be honest, once you know the infectus is writing correctly (which yours is) you can just do an update without compare and it should be fine.

    The compare is just to make sure you arent getting infectus ground bounce, random data added or any of the other issues infectus can have

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