Gah. Any idea why the Windows installer isn't showing up as bootable?

We're using EFI. The installer image appears to be using a UDF filesystem.

@IceWolf how did you create the installer medium? I've never gotten it to work without the Microsoft installer creator thingy

@noiob Uh just dd.

@noiob We unfortunately don't /have/ a Microsoft installer creator thingy since we um don't have a working Windows installation! :P

@IceWolf this thing says to manually format the disk as FAT and copy over the files from the iso, I'd try that https://itsfoss.com/bootable-windows-usb-linux/

@noiob Thanks!

Tried that already. Ran into issues with install.wim being too big for the filesystem per-file size limit. Tried splitting it up like https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/install-windows-from-a-usb-flash-drive says to... although apparently it's using a fancy command to do the splitting, which we don't have access to, which I bet that's why it didn't work.

@noiob ... wait your article's telling us to format it as ExFAT? /Huh/. I didn't know EFI firmware could just boot from ExFAT like that.

@IceWolf yeah it probably has to so it can boot from SD cards?

@noiob /Huh./

@noiob I kinda forgot SD cards used exFAT by default.