this post was submitted on 19 Aug 2023
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EFI is on the hard drive. No bricking. You just need to reformat to include it again.
Ya wanna brick a mobo? Botch a flash to the bios chip.
No, you can brick the mobo from your OS by deleting the efivar partition.
If your talking about /sys/firmware/efi/efivars?
Yeah. You realize that’s on the bios chip? The efi partition on the hard disk is a different thing.
When a system posts, the main drive isn’t mounted. The mobo needs to go look for it. The bios actually holds the instructions on how to post and start the system. (The efivar are part of that.)
One step in that process is to look for the efi bootloader on the drive. That is the efi partition that won’t brick anything.
Alterations to the bios chip will, if they’re not done carefully. This is why it’s almost unheard of to flash a firmware update on consumer systems
My work laptop does this automatically. It's a Dell laptop btw