Dumping GDR's with only a $20 SD Adapter

Discussion in 'Sega Dreamcast Development and Research' started by atreyu187, Oct 21, 2012.

  1. atreyu187

    atreyu187 Intrepid Member

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    The class of sd card makes a difference. My old class 6 card clocked in a dump at about 45 minutes but my san disc extreme class 10 is the only card I get half an hour with. I wonder what I could get if I remove those caps though? I also have different adapters and get better results with my older one that isnt branded with the dreamshell logo. I just got them to match the color of the system they are being used on between my three systems.
     
  2. -=FamilyGuy=-

    -=FamilyGuy=- Site Supporter 2049

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    The effect of the caps is to make it fails over a certain speed threshold. Assuming the transfer isn't capped in software, the fact that the transfer works means it's at its max speed...

    I don't think removing the caps would help, unless there's a lot of errors going on, yet getting corrected, with your class10 card.

    Software-side it might be interesting to compress the transferred data on-the-fly with a strategy similar to ecm (for bin mode), might make a dump even faster. But one could argue 45 min ain't that much! Coder's cable used a similar strategy, it was gzipping the isos on-the-fly so an "empty" game would take less time to transfer (remember I said it was taking around 24 hours to dump 1.2gig).
     
    Last edited: Nov 4, 2012
  3. atreyu187

    atreyu187 Intrepid Member

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    Yes I recall when tera term was dumped and images were compressed as they streamed from the coders cabke to the pc and greatly increasing dumping times. I still have and use my coders cable from time to time believe it or not. Most to make prefetch data for AES4ALL personal builds to increase response times. And no 45 minutes or 30 for that fact isn't bad as even dumping from gd-rom over lan is capped at 12x 1.13 mbps at max speeds and takes about twenty plus minutes to dump and cost much more.
     
  4. Blai

    Blai Enthusiastic Member

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    I have tried ripping GD-Rs with this method and it always shows read error on track01.bin whereas all the other tracks are copied to the SD card without problems.

    Any clues on why the program can't copy track01.bin properly?
     
  5. RaZiel

    RaZiel Enthusiastic Member

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    If the track01
    If the track01 varies from the one retail disc you are using this is why i t fails I am afraid. At least that is the error I had when dumping via this method.
     
  6. Blai

    Blai Enthusiastic Member

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    So, if track01.bin of the beta GD-R differs from track01.bin of the retail disc of the game that I use to do the swap, I can not dump the GD-R, right?

    This sucks... I'll have to use the BBA I guess
     
  7. -=FamilyGuy=-

    -=FamilyGuy=- Site Supporter 2049

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    Well it all depends on why and how this technique works. Does it allow to dump 5tracks games using SA1 gd-rom, or does it appear as a 3-track one? If it appears as a 3-tracks one, it may simply be because the TOC of the original gd-rom is used.

    If this is the case, you could adapt the trap disc technique I have developed with dot50cal to dump your GD-R:
    http://www.mediafire.com/download/cnbkymnjomt/GD-R_Ripping.rar

    If you got a ton of Beta GD-R, getting/loaning a system disc is the easiest method. Just boot into dcsdrip, put the SD2, eject, put the beta, dump, put another beta, dump, yet another beta dump (repeat).
     
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