On Tue, Apr 08, 2008 at 02:54:48PM +0200, Louis V. Lambrecht wrote: > Not quite, you don't need a specific partition for grub.Grub only needs > to be installed > on the BIOS first boot device. > Which can be a hard drive, a floppy, a cdrom, an usb key... >
Thank you for your correction. I looked at an OpenBSD 4.1 machine and did not find grub in neither the packages nor the ports tree. So I erroneously assumed a non-OpenBSD aware grub was needed. > On a hard drive with only OpenBSD slices, grub will usually be installed > on the > first slice, the one with the largest volume label. The BIOS boot one. > > At boot, the mbr jumps to the /grub directory, loads some stages and > reads the > menu.lst. > Grub has the ability to mark partition types (keyword parttype) and > mark a partition active (define root(x,y) and keyword makeactive) > just as any fdisk would do (you eventually can partition a disk from > within grub). > > There is some info, even without the need to install it first: > /usr/ports/sysutils/grub/files/README.OpenBSD and a menu example > /usr/ports/sysutils/grub/files/menu.lst > ; : > Raimo Niskanen wrote: : : > >GRUB installed to MBR can do it, but needs a partition > >to exist in. So then it will be its second stage bootloader > >that does the selection. And you will have to modify > >menu.lst in the GRUB installation, so the GRUB installation > >will have to be writable from OpenBSD. > > : : -- / Raimo Niskanen, Erlang/OTP, Ericsson AB
