Recover OTP?

Discussion in '3DS - Homebrew Development and Emulators' started by TheMynx, Jan 3, 2017.

  1. TheMynx
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    TheMynx Advanced Member

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    Hello,

    I somehow managed to delete my otp.bin from wherever it's located on the SD card (don't ask how, I don't remember deleting it). How would I go about recovering the file from my 3ds? Do I downgrade back to 2.1 and use SafeA9LHinstaller to reinstall A9LH again? Or do I have to do something else?
    I'm on a New 3DS XL with A9LH and Luma3DS v6.6
     
    Last edited by TheMynx, Jan 3, 2017
  2. Giodude

    Giodude GBAtemp's official rock

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    I believe you just have to follow this to recover otp. https://3ds.guide/updating-a9lh
     
  3. godreborn

    godreborn GBAtemp Psycho!

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    does the system no longer boot? u shouldn't need the otp only if injecting into the flash. there's now an otpless way for new 3ds only afaik.
     
  4. annson24

    annson24 GBAtemp Advanced Fan

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    Otp.bin is inside a9lh folder. Not files9

    Sent from my SM-G935F using Tapatalk
     
  5. metroid maniac

    metroid maniac An idiot with an opinion

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    It's in files9? I thought it was in /a9lh/.

    Either way, you need to downgrade to 2.1 again. It's not really important though.

    That won't work.
     
  6. Giodude

    Giodude GBAtemp's official rock

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    That method was deemed unsafe due to random bricks. Also having the otp.bin is uesful just in case you need it for something. One use for it was having a pin lock installed to the 3ds nand, and the only way to bypass it was using your console unique otp.bin.

    — Posts automatically merged - Please don't double post! —

    You sure? I could test it right now. It has no mention of needing an otp.
     
  7. TheMynx
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    TheMynx Advanced Member

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    I'll check /a9lh/ and pray it's there

    It does but I'm afraid I may need the OTP again and I won't have it. Better safe than sorry

    EDIT: It's not in the a9lh folder either. Is it worth downgrading back to 2.1 to recover the OTP? I already have Legends of Exidia with the exploited save file in case I ever lose access to A9LH
     
    Last edited by TheMynx, Jan 3, 2017
  8. punderino

    punderino aka Big-Dick Swinger

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    Not worth it, you can update a9lh without your otp and the bootrom exploit is coming SOONtm
     
  9. godreborn

    godreborn GBAtemp Psycho!

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    yeah, u should keep the otp safe on ur computer. I have 2 3ds, an old nonXL, and a new 3ds XL. I placed both of their otp's on my laptop. I think they may be on the sd cards as well. also, the disk where I've stored the entire online catalog of wii u titles, has my xbox 360 NAND (both since I have two jtags), my ps3 NOR, my 3ds NAND, my Wii NAND, and my wii u NAND too. it's mostly serving as storage/backup. it was being used as my Wii backup drive, but I've replaced that drive.
     
  10. punderino

    punderino aka Big-Dick Swinger

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    There's no reason to keep the OTPs tho. The backups of NANDs make sense, but not the 3DSs OTPs.
     
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  11. TheMynx
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    TheMynx Advanced Member

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    I won't go through the trouble then.
     
  12. godreborn

    godreborn GBAtemp Psycho!

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    I wasn't aware of that. I knew u could update without the otp, but I've always kept it as a safe measure. could otp-less be attributed to user error? my friend installed it to his new 3ds and his 2ds which I didn't even think was possible since it uses the same fw as the o3ds. he never told me about any issues he had with it.
     
  13. TheMynx
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    TheMynx Advanced Member

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    There could be some user error, but from what I've read the devs said there is an unknown bug causing the OTPless installation to randomly brick. AFAIK they've tried lots of things but they can't manage to fix it, so OTPless should be a no go for everyone IMO :P
     
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  14. Dimensional

    Dimensional GBAtemp Advanced Fan

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    I believe you can use A9LH to run the OTP dumper and get the record again.
     
  15. TheMynx
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    TheMynx Advanced Member

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    Problem is I can't seem to find any homebrew that allows dumping the OTP again, except
    https://gbatemp.net/threads/release-otphelper-otp-dumping-downgrade-helper.416996/
    But even then it has a brick risk
    for not much in the end.
    After all, what is the OTP really used for other than installing A9LH? Once you installed it you won't need it anymore from what I've seen.
     
  16. godreborn

    godreborn GBAtemp Psycho!

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    I see. I'm not sure. it took me six hours to install a9lh on each of my 3ds systems.
     
  17. d0k3

    d0k3 3DS Homebrew Legend

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    That post was a long while ago. Since then, the risk has gotten a whole lot smaller than it was before. I honestly wouldn't recommend the 2.x downgrade process again if you just lost your OTP.bin, though. You simply won't need it for a long while (not even for upgrading your A9LH installation), maybe never again if you are already on A9LH.
     
  18. TheMynx
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    TheMynx Advanced Member

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    I won't take any useless risks then, since the OTP is practically useless for anything else other than installing A9LH. Thanks for the help!
     
  19. zetaPRIME

    zetaPRIME Advanced Member

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    Not to mention that once sighax'd loaders are a thing you'll be able to dump your full OTP from there since arm9loader won't have even run enough to lock it out.