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XXBOOT(8) System Manager's Manual (landisk) XXBOOT(8)

xxboot — LANDISK-specific primary boot loader

This small program, residing in the reserved sectors at the beginning of the root file system of the system, is responsible for loading the second-stage boot(8) program (typically /boot), which in turn will load the kernel.

To install (or update) the xxboot program, use disklabel(8) with the -B switch.

When xxboot receives control from the master boot record (MBR) it will print a banner:

OpenBSD MBR

followed by a little twiddler while reading the second-stage boot.

/usr/mdec/mbr
Master Boot Record block
/usr/mdec/xxboot
primary bootstrap
/boot
secondary bootstrap
/bsd
OpenBSD kernel
/bsd.rd
OpenBSD kernel for installation/recovery

xxboot will print messages indicating errors as returned from the firmware.

boot(8), disklabel(8), fdisk(8), mbr(8)

July 6, 2017 OpenBSD-7.0