Whats the process when booting from local disk?
The disk is expected to have an “FDISK” style partition table with a “Linux native” (ID 131) partition with an ext2fs (old style, pre-Linux 2.2; see posting by Andrew Gillham for more details). The default autoboot process loads a gzip’ed ELF kernel from /boot/vmlinux.gz (or /boot/vmlinux_RAQ.gz or /boot/vmlinux_raq-2800.gz) from the EXT2 filesystem on the first MBR partition on the primary disk. There is no provision for changing the boot path beyond disabling autoboot and the kernel (or the boot loader, if/once we should write one) must always be gzip’ed. When there is no NetBSD disklabel on the disk, the four MBR partitions are mapped to [e-h].