How is vmlinux loaded?

Question

linux

Good afternoon!
Question for Linux gurus.
There is CentOS 7, 2 hdd-sda and sdb. On both, I created /boot and assembled them into a software RAID1.
Tell me, how will the process of loading the vmlinuz kernel then take place, if the bootloader is, in fact, not on the first device, but on both?

Answer 1

Take which is indicated.
stage 1:
Reads the information from the MBR of the disk specified in the BIOS and loads the rest of the bootloader into memory.
stage 2:

Answer 2

if the bootloader is in fact not on the first device, but on both?

RAID1 is, in fact, a fiction, duplicated media.
Your bootloader will count, and only in a single copy, if both copies are identical.