Hi, Nick, Thanks for you advices, I clear Grub from my MBR, and flag the OpenBSD partition bootable , but I also got a "ERR M" error code. Yes, I read "man biosboot", but I don't know how to resolve it. I try to reinstall OpenBSD 4.5 again , but it is the same error :(.
2009/5/7 Nick Holland <n...@holland-consulting.net> > 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.
