Hacking Question Some questions regarding NAND restoration

[Omar2325]

I would like to get prepare for atmosphere's emunand, but
I have some question jut to be sure...

1- Is there a way to check a NAND backup version? I have several NAND backups, but I can't remember which one is my clean one
2- If I did a clean NAND backup but didn't backup BOOT0 and BOOT1, am I screwed?
3- Just to be sure... Hekate says I have 6/64 burnt fuses, does that correspond to 5.1.0 fw?
4- If Im on latest version and I want to restore to 5.1.0... I remembered I don't have exFat support in that backup, so is there going to be a problem when I restore my NAND if my sd card is currently formatted to exFat? If that's the case... How can I restore my NAND backup on FAT32? it's a 32GB file and FAT32 does not support it.

Thank you in advance

 

[Hayato213]

1. You can use the firmware version inspector, see below to check the NAND version, as for clean nand if you didn't make one before launching any cfw then it is not clean.
https://gbatemp.net/threads/firmware-version-inspector-get-fw-version-from-nand-dump.515308/

2. If your boot0/boot1 doesn't match with the correct firmware and fuse then you can't use them.

3. 5 burnt fuse is for 4.0.0 to 4.1.0, see the anti downgrade table.
https://switchbrew.org/wiki/Fuses#bootrom_ipatch

4. If you burnt your fuse then you can't downgrade, you need to use exfat when you want to restore your nand as you would combine the raw nand file.

 

[Omar2325]

so basically if I didn't do the boot0 and boot1 backup I can't restore my NAND?