So I could not find anything on this anywhere.
Here is my story.
A few weeks ago I set up an emuMMC as an SD file from Hekate. (You can apparently use the files created by this to do a restore in Hekate)
Yesterday I thought I would update my sysnand (no really good reason). I don't know the specific rules around when fuses will burn so I used ChoiDujournx just to be sure. It worked. I got all upgraded to 9.0.1. However, when the switch started booting up into the sysnand I was greeted with a message something like "The MicroSD card was used by another Nintendo Switch" followed by a message asking me to delete everything on the sd card. This is obviously not what I wanted.
This sucks I would love another solution to this in case I want to upgrade my sysnand int the future. However, I was lucky my emuMMC was still in a good state.
So here is how I restored my emuMMC to my sysnand.
1. I copied the files from SDCARD/emuMMC/<foldername>/eMMC to SDCARD/backup/<foldername>/restore
2. I then renamed all the numbered files example: "00" => "rawnand.bin.00", "01" => "rawnand.bin.01" ...etc
3. I then went into Hekate and did a full restore.
This worked fine for me. I'm not a crazy person I tested this beforehand by combining the rawnand chunks on a pc then using hacdiskmount to browse the files.
I suspect if you have a fuse mismatch that could be a problem. You might not want to try this.
Also I already had a pretty dirty sysnand before emuMMC support came out. So I am just fine with my dirty sysnand for now.
Hopefully, this helps somebody else.
Here is my story.
A few weeks ago I set up an emuMMC as an SD file from Hekate. (You can apparently use the files created by this to do a restore in Hekate)
Yesterday I thought I would update my sysnand (no really good reason). I don't know the specific rules around when fuses will burn so I used ChoiDujournx just to be sure. It worked. I got all upgraded to 9.0.1. However, when the switch started booting up into the sysnand I was greeted with a message something like "The MicroSD card was used by another Nintendo Switch" followed by a message asking me to delete everything on the sd card. This is obviously not what I wanted.
This sucks I would love another solution to this in case I want to upgrade my sysnand int the future. However, I was lucky my emuMMC was still in a good state.
So here is how I restored my emuMMC to my sysnand.
1. I copied the files from SDCARD/emuMMC/<foldername>/eMMC to SDCARD/backup/<foldername>/restore
2. I then renamed all the numbered files example: "00" => "rawnand.bin.00", "01" => "rawnand.bin.01" ...etc
3. I then went into Hekate and did a full restore.
This worked fine for me. I'm not a crazy person I tested this beforehand by combining the rawnand chunks on a pc then using hacdiskmount to browse the files.
I suspect if you have a fuse mismatch that could be a problem. You might not want to try this.
Also I already had a pretty dirty sysnand before emuMMC support came out. So I am just fine with my dirty sysnand for now.
Hopefully, this helps somebody else.