Date: 18 Apr 2006 10:17:05 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: Amanda Babcock Furrow <alb@quandary.org> Cc: freebsd-questions@freebsd.org Subject: Re: boot0: is booting from non-BIOS-recognized disk possible? Message-ID: <44fykb9dem.fsf@be-well.ilk.org> In-Reply-To: <20060417021128.GA5028@panix.com> References: <20060417021128.GA5028@panix.com>
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Amanda Babcock Furrow <alb@quandary.org> writes: > I have read the boot0cfg, disklabel (I have FreeBSD 4.9), and fdisk > manpages trying to figure out if boot0 can solve my problem. I did > not find the answer there, or in http://www.freebsd.org/doc/faq/disks.html > or the freebsd-questions archives. > > I would like to be able to boot from my Seagate ST3120814A, which is > not compatible with my BIOS (Award Modular BIOS v4.51PG, BIOS string > 08/21/97-580VPX-VIA83669-2A5LD000C-00, VT 580VX MMX motherboard). > The BIOS, for which no update was ever issued, will hang during disk > detection unless I disable the Seagate by setting it to "None" in > the BIOS (as opposed to "Auto" and "User", which hang). However, > once I boot FreeBSD from an older disk, the Seagate is detected as > /dev/ad3 and partitions from it can be mounted. > > I understand that boot0 can be configured to boot from a second disk > using the -s 5 argument of boot0cfg. However, the boot0cfg man page > does not go into great detail. Can boot0 boot from a disk which is > disabled in BIOS but accessible from FreeBSD, or only from disks which > the BIOS is able to detect? The latter. It can, however, use the "packet interface" as well as the old cylinder-based BIOS interface; perhaps that will work for you.
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