Need help locating warmboot_mariko.bin (~44KB) – reviving 4.1.0 Switch with Caffeine

[nobody168]

Hey everyone,

With the help of ChatGPT, I recently installed Linux Mint on an older XPS13 and successfully set up a local Caffeine warmboot server, trying to get my patched Switch (on firmware 4.1.0) working again. The server runs fine — I can access and interact with the content from the Switch’s browser.

But I’ve hit a wall: I’m missing a critical file — warmboot_mariko.bin (about 44KB). I’ve searched all over, including old guides, mirrors, and GitHub forks, but the download links are all dead now. I’ve never seen this file before, probably because I never actually set up my own server until now.

Of course, I’m just trying to restore a working setup — nothing shady, just need this one file to continue.
If anyone has a known good copy or can point me to where I might get it (or how to rebuild it cleanly), I’d really appreciate it.

Thanks in advance!

 

[Dust2dust]

You're asking for warez, my friend. Your post will be deleted by mods, including my comment.

 

[iiTzSamurai]

warmboot_mariko.bin is made by the switch itself from what I know, youll need to boot into sysmmc cfw atleast once for that file to be generated on the root of the sd card

Thread 'Failed to match warmboot with fuses (HELP)'

Jun 8, 2025

Hey i updated my STOCK OFW to 20.0.1 but i kept my emuMMC to 19.0.1, when i launch it i get the error failed to match warmboot with fuses. and when i launch CFW - sysMMC i get " unknown pkg1 version" here are some photo (i'm on a v2 mariko switch btw with a mod chip)

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