Feifei (7I7I) wrote: > Hi, guys, > > I just install the OpenBSD 4.5, but my grub configuration can't boot it. > Before that, I use OpenBSD 4.2, it is a new installation, not upgrade. ... > It works well with the OpenBSD 4.2, > > But , if I use it to boot 4.5, I only get a error : > Starting up ... > Loading ... > ERR M
man biosboot will tell you what the error means. http://www.openbsd.org/faq/faq14.html will show you how the boot process works. I'm going to assume you read that before I expect you to understand this: short version: the PBR read something, but it wasn't /boot. I'm not a grub expert, but obviously the PBR you are running isn't the one that OpenBSD put into place. Some boot loaders do silly things like store a copy of the real PBR somewhere they think is cool, and when you reinstall the OS, the stored PBR doesn't get replaced when the real one is. So now you have the old PBR reading ...something other than /boot If you replace your grub boot loader with a normal MBR and flag the OpenBSD partition as active, I bet the system will boot just fine. Alternatively, do whatever voodoo you need to do to tell grub there is a new PBR for it to use. Nick.
