NAND Restore Questions

Discussion in 'Switch - Exploits, Custom Firmwares & Soft Mods' started by SmashApe, Oct 4, 2019.

  1. SmashApe
    OP

    SmashApe Member

    Newcomer
    1
    Jan 25, 2019
    Australia
    Hi all,

    When I first got my Switch I did a NAND backup and have been offline on CFW ever since. I now want to run OFW on SysNAND and CFW in EmuMMC.

    A few questions;
    1. My clean NAND backup is on 5.0.0 and my live CFW is on 6.0.0 (fuses burned) and 9.0.0 with ChoiDujourNX. Will restoring a 5.0.0 NAND with 6.0.0 fuses burned on the Switch cause any issues?
    2. I'm assuming if I want to play Fortnite online that I'll need the latest firmware on SysNAND, and I assume fuses must be burned to do that?
    3. Can I restore my current CFW into EmuMMC so I don't lose all of my settings, saves etc?
    Sorry for all the questions, I just didn't want to balls this up and brick my unit.

    I really appreciate any help.

    Cheers, SA
     
  2. Budsixz

    Budsixz GBAtemp Fan

    Member
    5
    Oct 27, 2018
    India
    1. Since your fuses are burnt downgrading means that you will have to keep AUTORCM ON always. Else you wont be able to boot.
    2. Yes you Sysnand has to be on latest fw to play online. you can boot normally in your sysnand at 9.0 only. If it is on lower fw then only will you need autorcm.
    3. Yes restoring the mmc means everything will revert to how it was including save files, games, etc. EVEN THE ONES IN MEMORY CARD.
     
    Last edited by Budsixz, Oct 4, 2019
  3. F4mouZSt4r

    F4mouZSt4r Advanced Member

    Newcomer
    4
    Apr 29, 2018
    Germany
    1. If you downgrade back to 5.X you need to use autoRCM or update back to 9.X, this way you can disable autoRCM
    2. Yes you need to be on the latest FW
    3. You can backup the Saves with Checkpoint and migrate the emuNAND from the NAND, means you only need to reinstall the games, the Save could be still there but if not, you can restore them with Checkpoint
     
  4. SmashApe
    OP

    SmashApe Member

    Newcomer
    1
    Jan 25, 2019
    Australia
    You mean I won't be able to manually boot (with a jig) into RCM?
     
  5. Budsixz

    Budsixz GBAtemp Fan

    Member
    5
    Oct 27, 2018
    India
    If you come from a higher fw to lower fw (with fuses burnt) then you wont be able to normally boot up your switch unless it is in autorcm. It gets stuck in bootloop or kernel panic is what they say (maybe putting it rcm manually everytime would work too but better ask someone)
     
  6. SmashApe
    OP

    SmashApe Member

    Newcomer
    1
    Jan 25, 2019
    Australia
    Well I only want to manually RCM once and then I'll update it to the latest OFW (I don't care about burning the fuses). So as long as I can manually RCM once. I think there is a concern with hackers that Nintendo can detect Autorcm.
     
  7. Budsixz

    Budsixz GBAtemp Fan

    Member
    5
    Oct 27, 2018
    India
    What i did for my downgrade was -
    1. Take full backup of saves (and nand +boot0&1 just incase)
    2. Restore my old clean 6.1 nand (was on 7.0.1) and turned on autorcm
    3. Update to 8.1 via official method (this will automatically turn off autorcm)
    4. used cfw later
     
    Last edited by Budsixz, Oct 4, 2019
    SmashApe likes this.
  8. Kafluke

    Kafluke GBAtemp Guru

    Member
    14
    May 6, 2006
    United States
    So much misinformation here. No you dont need autoRCM if you downgrade. You're correct in assuming you can use your jig. With a fuse mismatch you just have to use a custom bootloader. Read the PSA in my sig.
     
    SmashApe likes this.
  9. Budsixz

    Budsixz GBAtemp Fan

    Member
    5
    Oct 27, 2018
    India
    what part of it is wrong? except maybe the autorcm which i already said I wasnt sure of but i knew we cant boot normally after downgrade
     
  10. Kafluke

    Kafluke GBAtemp Guru

    Member
    14
    May 6, 2006
    United States
    You werent the only one who said autoRCM was necessary.
     
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