You have more knowledge in just one neuron than most people have in their entire brain. Thank for this wonderfully instructive video. I learned so much.

One little caveat, the GPT partition table is actually stored on the sectors directly after the first instead of sector 0. This allows for UEFI systems to be backwards compatible with MBR. Other than that, excellent video! I’ve been looking everywhere for an explanation as good as this.

Great video, thank you!

I love the introduction!

The explanation of the MBR boot process seems to be wrong - there's a core.img at a well defined location on the disk, this is accessed by the code in the MBR. The MBR is too small (512-sizeof(partitiontable)-2 (magic number)) to understand a linux filesystem and thus can't access /boot/grub.

Thank you so much

UEFI actually makes writing your own OS much easier because it provides a lot of services, doesn't have any size limitations, and it can switch CPU in 32 or 64 bit mode before invoking your code, so you won't have to mess with that yourself.

amount of knowledge this guy have is 🔥🔥. Recommended

you made a typo 'sev' instead of 'dev', check when you blind-typing...

Hi, Thanks a lot, that was insightful.

@27:07: '/sev/sda' as part of grub-install. Shouldn't that be '/dev/sda'?

Cool t-shirt

Isnt the GPT partition table the second sector and not the first? @07:45 At least I'm sure that its the case in Windows, where the first sector doesn't really matter, and the second sector is the GPT table that sarts with "EFI PART" Magic string.

Awesome, about time I got booted right!

It all starts with a "Hello, World!"