Question Setting Up EmuNAND Partition on SD Card for Atmosphere

Discussion in 'Switch - Exploits, Custom Firmwares & Soft Mods' started by RHOPKINS13, Jun 17, 2019.


    RHOPKINS13 Geek

    Jan 31, 2009
    United States
    Hi y'all,

    I'm very excited about the new emunand functionality in Atmosphere, and I want to try it out. As I understand it, there are three different ways of storing your Emunand for Atmosphere:
    1. An emunand partition on your SD card - Separate partition for storing files can either be exFAT or Fat32
    2. An emunand folder with backups of boot0, boot1, and raw nand (single file) - MUST use exFAT
    3. An emunand folder with backups of boot0, boot1, and raw nand (multiple files) - Either exFAT or Fat32
    I know that emunand support is current considered experimental, but I would THINK that option number 1 would be the safest to use, with a separate FAT32 partition for file storage. I intend to also use emulators and homebrew that is said to be much safer using FAT32 than exFAT, and it would seem to me that using a nand backup kept in multiple files would be more prone to problems than one that is stored plainly on the SD card, not even inside of a FAT32 partition.

    So the question is, how does one actually set up this partition? I haven't seen any guide for this, perhaps I should get off my lazy ass and check the Atmosphere discord. I'm familiar with using dd in Linux to clone drives and partitions, and to make images.

    Is it as simple as using dd to copy your NAND backup to the beginning of your SD card? And then using a tool like gparted to create a FAT32 partition after it? What about boot0 or boot1?
  2. makazula

    makazula Member

    Mar 3, 2019
    you have to combine your boo0+boot1+rawnand into a single emummc.bin first (do it in that order). then yeah, you create the partition in your sd for files and another for emummc - this partition should have roughly the same size as the emummc.bin (do it a bit bigger just to play safe).

    dd emummc.bin into that partition, setup the atmosphere emummc.ini and you're good to go.
  3. ZachyCatGames

    ZachyCatGames GBAtemp Advanced Maniac

    Jun 19, 2018
    United States
    Partition based isn't any more or less safe from bans than file based as Ninty doesn't check for files. Partition based might be safer when it comes to corruption though. Partition based will also have better performance

    For setting it up, here's a little guide from #switch-hacking-meta on ReSwitched made by Ave:
    Warning: Spoilers inside!
    RHOPKINS13 likes this.

    RHOPKINS13 Geek

    Jan 31, 2009
    United States
    Yeah, I guess I should have made that clearer in my post. With emunand, I'm more concerned about being safe from data corruption than I am about bans.

    And I'm using a separate microSD card for emunand, so I'm not worried about Nintendo checking for stuff.

    EDIT: Also, THANKS FOR THE INSTRUCTIONS YOU POSTED! Looks great, going to set this up tonight!
    Last edited by RHOPKINS13, Jun 17, 2019