Date: Fri, 2 Mar 2007 17:52:52 +0000 From: RW <fbsd06@mlists.homeunix.com> To: freebsd-questions@freebsd.org Subject: Re: Dual booting problems Message-ID: <20070302175252.16a43a6f@gumby.homeunix.com> In-Reply-To: <20070302163726.GC90036@gizmo.acns.msu.edu> References: <63c8e94f0703011336l3b90c7b8r3b3ba31423aa2276@mail.gmail.com> <200703011321.43142.beech@alaskaparadise.com> <200703011330.45944.beech@alaskaparadise.com> <20070302003410.4106fcfd@gumby.homeunix.com> <20070302163726.GC90036@gizmo.acns.msu.edu>
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On Fri, 2 Mar 2007 11:37:26 -0500 Jerry McAllister <jerrymc@msu.edu> wrote: > On Fri, Mar 02, 2007 at 12:34:10AM +0000, RW wrote: > > > On Thu, 1 Mar 2007 13:30:26 -0900 > > Beech Rintoul <beech@alaskaparadise.com> wrote: > > > > > I should also mention that you need the FreeBSD boot manager on > > > both disks, or an alternative boot manager such as grub or gag. > > > Read the handbook. > > > > I recall reading that too, but I've never understood what it's > > supposed to achieve. I imagine it must be a quirk of the FreeBSD > > boot manager, I've certainly never needed to install more than one > > copy of GAG or LILO. > > If you select F5 (maybe F6 or more, I should try that some time) it > will instead cause the MBR from that second (maybe third, etc) disk > to be loaded and passes control to it. Then that MBR looks at its > own slice table and makes up a menu if there are more than one > bootable slices on that drive. In other words it *is* a quirk of the FreeBSD boot manager, in that it doesn't allow you to chainload a partition on another drive directly. You have to chainload the intermediate MBR which needs a second copy of the bootmanager. Most bootmanagers can do this directly, using the partition table on the other drive.
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