@Sebastian-Roth for help the three exit types were sanboot, grub, and exit. Sanboot is ipxe’s way of getting first hard drive which appears at bios memory address of 0x80. It’s not always a workable method, so the grub exit type was brought in which can find or use an HDD. In 1.2.0 it always assumes the first disk is hd0. Exit does what it sounds like, it exits back to the bios for handling what to boot next.