Ensure you have a pre-cfw CLEAN NAND backup if you want to use sysnand for online

File based EmuMMC is working but if you use FAT32 it is very limited and heavily bottlenecked, if you decide to use exFAT then it is very unstable and can corrupt your SD card easily; as of now use partition based as file based is very slow/unstable!!

Rewriting guide with NYX in mind alongside quad boot files for that.


Pre-Setup [Win/Linux]

Spoiler

• Dump your NAND via hekate or use a clean dumped nand(you need to dump BOOT0/BOOT1 and rawnand) ENSURE AUTORCM IS TURNED OFF!
• Merge these into one file using:
  
  Linux cmd:
  cat BOOT0 BOOT1 rawnand.bin.00 rawnand.bin.01 rawnand.bin.02 rawnand.bin.03 rawnand.bin.04 rawnand.bin.05 rawnand.bin.06 rawnand.bin.07 rawnand.bin.08 rawnand.bin.09 rawnand.bin.10 rawnand.bin.11 rawnand.bin.12 rawnand.bin.13 rawnand.bin.14 > emummc.bin
  
  Windows cmd:
  copy /b BOOT0+BOOT1+rawnand.bin.00+rawnand.bin.01+rawnand.bin.02+rawnand.bin.03+rawnand.bin.04+rawnand.bin.05+rawnand.bin.06+rawnand.bin.07+rawnand.bin.08+rawnand.bin.09+rawnand.bin.10+rawnand.bin.11+rawnand.bin.12+rawnand.bin.13+rawnand.bin.14 emummc.bin
• If you are using a single file dumped nand then:
  Linux cmd:
  cat BOOT0 BOOT1 rawnand.bin > emummc.bin

Windows cmd:
copy /b BOOT0+BOOT1+rawnand.bin emummc.bin

Setting up EmuMMC[Linux]

Spoiler

1. Format your SD, clear any partitions and etc.
2. Create your normal partition (MAKE SURE IT IS FAT32 AND 32K CLUSTER).
3. Leave enough space to fit the NAND image.
4. Make that last partition FAT32 aswell
   
5. Identify the partition address */dev/xxx
6. Use this command to write your complete emummc image to the EmuNand partition we made earlier:
   sudo dd if=<your_emummc_bin> bs=512M of=<Step 5, partition add> status=progress
7. Once this is done download the latest AMS and Hekate.
8. Download the EmuMMC config and create a folder named "emummc" then paste it there..
9. Use a tool like GParted to find the first sector of the partition holding the EmuNAND
10. Convert the value from step 8 to hexadecimal > just google <number> to hexadecimal ; it should give out a number such as 0x1039 and etc; IF on the case that it gives one like say 800 then it'll be 0x800.
11. SOMETIMES EmuMMC may not work fully with "0x" infront of the sector, it's hit & miss.
    
12. edit the config file in emummc with this value.

Setting up EmuMMC[Windows10]

Spoiler

Install tools:

• https://www.partitionwizard.com/partitionmanager/sd-partitions.html (Has freeware installer at the end, ensure you untick the box)
• https://uranus.chrysocome.net/linux/rawwrite/dd-0.4beta1.exe (Copy this into the folder where you made your complete EmuMMC image, rename it to dd)

Steps:

• Using the partition tool, delete all partitions on the sd (all data on the sd will be gone)
• Create the first partition at the start of the table, make this a Fat32 32K Cluster partition, leave 31GB at the end of the table.
• Format the end partition as FAT32 aswell, cluster size does not matter.
• 
• Using CMD cd into the folder where you have your emuMMC files and dd.
• Figure out what partition you will specificy to DD by using running the cmd dd --list
• 
• As you can see K: is my EmuMMC partition and it is linked to \\?\Device\HarddiskVolume19, this is the disk we will write to via DD.
• Using the CMD dd if=<your_emummc_bin_path> bs=512M of=<Disk we identified on previous step> --progress image your EmuMMC onto the last partition.
• Once the last partition has your EmuMMC, start setting up AMS and Hekate, download Atmosphere CFW and Hekate.
• Copy AMS + Hekate onto your SD
• Download the EmuMMC config and create a folder named "emummc" then paste it there.
• Find your first sector by using the disk tool, right click your EmuMMC partition > properties > partition info > first physical sector.
• Convert the number to hexadecimal by going on google and searching <Number> to hexadecimal ; a value such as 0x492A3900 or etc will show.
• SOMETIMES EmuMMC may not work fully with "0x" infront of the sector, it's hit & miss.
• Open emummc folder on your sd then open the config and paste the hexadecimal number over the existing one.
• Launch hekate then atmosphere, if it is all done right you should be in EmuMMC

Dual/Triple/Quad boot[L4T Ubuntu/Lakka, Stock-Sys, EmuNand]

Spoiler

Rewrite in progress

Notes:

• No I won't sit you through this, the process is already laid out there.
• If you decide to use exFAT I won't really help.
• You can do the partitioning and file merging on windows but I don't know any tool to write the image to a specific partition.
• There is NO such thing as *Cleaning* your NAND, if you don't have a clean backup then bad luck, you can maybe get away with clearing logs if you haven't been online for a long time but even then I wouldn't suggest it; should've made a clean NAND backup, I won't guide you through any of that.

CLICK HERE FOR EMUMMC CONFIG

DISCLAIMER: I am not resposible for you killing your switch, bricking it from the failure to make a NAND backup; I am in no way obliged to provide you personal support nor am I obliged to do anything else; I'm not resposible for you messing up your SD Card either.



Windows guide:

 

[eyeliner]

I tested it. It works for me. :/

What version / fw, please? And thank you.
I am right now making a backup of my 8.1.0. There's no point in me having older backups, now.
I'l post results.

 

[ELY_M]

No possible way to prevent fuses burning. I burnt my fuses to 10 due to that I always update normal way.
personally, I dont care about my fuses. I am fuses burner

Then how would one person prevent their fuses from being burnt? Or is there no way if you want to play online?

--------------------- MERGED ---------------------------

I have same problem. I had to press power button again after I see that the switch logo screen stuck. I press power button again and ofw booted up.

I have a situation.

When I shutdown from emummc and then try to boot the switch regularly, it gets frozen on the switch logo. When it does this, I have to press the power button and it shuts off immediately. Pressing the power button again starts the switch normally and I no longer experience that freeze, until after the next time I switch from using Emummc again. Is this happening to others?

 

[tabzer]

What version / fw, please? And thank you.
I am right now making a backup of my 8.1.0. There's no point in me having older backups, now.
I'l post results.

I'm using latest everything.

No possible way to prevent fuses burning. I burnt my fuses to 10 due to that I always update normal way.
personally, I dont care about my fuses. I am fuses burner




--------------------- MERGED ---------------------------

I have same problem. I had to press power button again after I see that the switch logo screen stuck. I press power button again and ofw booted up.

I am curious to who doesn't have the issue.

 

[ottos1989]

So no ideas? I'm stuck at this one last step. It doesn't matter if I resize the partition, it still will only flash upto 4gb when using terminal

 

[tabzer]

Can you verify the size of /dev/mmcblkp2 via operating system? What does it say?

--------------------- MERGED ---------------------------

Also that command seems to be missing bs=512mb, but I'm not sure that is causing your issue.

 

[shado9573]

Has anyone tested any games on EmuMMC and ran it with individual files on sd?

 

[essm1988]

Question, can I test my clean nand backup by way install it in emummc for know do I have a good nand backup to avoid brick my switch when restore it?

Shortly I want test my nand backup before restore it

Sorry for bad english

 

[tabzer]

Question, can I test my clean nand backup by way install it in emummc for know do I have a good nand backup to avoid brick my switch when restore it?

Shortly I want test my nand backup before restore it

Sorry for bad english

You should be able to, but if you have a backup, it shouldn't matter if you test it on the NAND. It's not like you are going to stop RCM from working by installing a bad firmware.

 

[essm1988]

You should be able to, but if you have a backup, it shouldn't matter if you test it on the NAND. It's not like you are going to stop RCM from working by installing a bad firmware.

I mean I want check my nand backup because if it is bad nand backup it will brick my switch when I restore it , rcm and update are different story.

However is there anyway to check my nand backup?

 

[tabzer]

I mean I want check my nand backup because if it is bad nand backup it will brick my switch when I restore it , rcm and update are different story.

However is there anyway to check my nand backup?

Oh. Are you saying it is your only backup? If that's the case you can set it up with emummc. Follow this guide, make sure you have the boot0 boot1 and rawnand.bin and combine them as described, write them (via DD) to a partition on an SD card, and use the SD files with Atmosphere 9.1+ to try it. If you follow the tutorial (you should) then you will find that the only way to create emummc is with your backup, and therefore is a way to test if it is viable.

 

[eyeliner]

Again with my woes, I caved in and resorted to ReiNX. Lego Worlds boots without an itch. I have to get patience to redo the steps, but for now, I'll have to be in the old ways a while longer. I wonder if it's a card speed issue...

Thanks for the help, @tabzer

Also, the speed at wich Goldleaf installs by USB increased quite a lot when I installed directly to the NAND. I'm almost positive there's something about the card speed that breaks something in the EmuMMC. More tests need to be conducted.

Later.

 

[Patrykek]

After 10h of use, my emummc corrupted?
Black screen after ams logo.
It creates a crashlog with error (2002-4373)

SanDisk Ultra 64GB SDXC
ams 0.9.1
fusee_primary.bin
8.1

 

[tabzer]

I caved in and resorted to ReiNX

Poor soul. As long as it works for you, you can bide the time. I wonder if it was a sigpatch issue.

 

[eyeliner]

Poor soul. As long as it works for you, you can bide the time. I wonder if it was a sigpatch issue.

Why the jab?
ReiNX works for me, worked for as long as I remember. These last few days of EmuMMC have been nothing but frustration, random crashes and wasted time.

I went towards the best solution for me. No hate towards Atmosphere.

I don't understand the CFW extremism around here.

 

[tabzer]

Why the jab?

I am not a big fan of reinx, for reasons of both personal taste and the relative delay in supporting current version. It works for you, that's good. Does emummc work with Reinx? I didn't know that.

 

[eyeliner]

I am not a big fan of reinx, for reasons of both personal taste and the relative delay in supporting current version. It works for you, that's good. Does emummc work with Reinx? I didn't know that.

I have put emuMMC on hold. I'll try another memory card soon.

 

[tabzer]

Ah. That's what my "poor soul" comment was about. More about your frustrations and lack of conclusion than it was about my lack of interest in reinx. Hopefully something more user friendly comes around soon.

--------------------- MERGED ---------------------------

I think that if it works with Reinx, then it should work with Atmosphere (with sigpatches). I feel like there must be an oversight. Could be simple. Could you ever get the game working on Atmo before trying emummc?

 

[megahog2012]

Very quick question I want to update my firmware on the switch to the latest version, But I don't wanna make the emunand unusable. Should I update the Emunand first then the Sysnand or Vice versa? and if vice-versa how would I update the firmware without using Atmosphere?

 

[Patrykek]

Very quick question I want to update my firmware on the switch to the latest version, But I don't wanna make the emunand unusable. Should I update the Emunand first then the Sysnand or Vice versa? and if vice-versa how would I update the firmware without using Atmosphere?

If you wanna play online, update both. If you wanna don't want to, update your system through ChoiDjourNX without burning fuses.

 

[TariqSoftDev]

Very quick question I want to update my firmware on the switch to the latest version, But I don't wanna make the emunand unusable. Should I update the Emunand first then the Sysnand or Vice versa? and if vice-versa how would I update the firmware without using Atmosphere?

EmuMMC leave it on 8.0.1, 8.1.0 may need work; sysNand if playing online just do norm update to latest.