Date: Mon, 13 Oct 2008 09:22:42 +0100 From: Dieter <freebsd@sopwith.solgatos.com> To: freebsd-amd64@freebsd.org Subject: Re: am2 MBs - 4g + SCSI wipes out root partition Message-ID: <200810131622.QAA13636@sopwith.solgatos.com> In-Reply-To: Your message of "Mon, 13 Oct 2008 11:25:41 -0200." <200810131125.41343.joao@matik.com.br>
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> > It sounds as if there's an implementation/design problem either in > > FreeBSD's hardware compatibility support for AM2 (probably something > > very low-level) systems, or there is a bug with these Gigabyte boards; > > good, but it is not only gigabyte, I experienced it on Asus, Abit, Epox and= > =20 > MSI =20 Perhaps something common in the firmware/BIOS ? > all this MBs have in common that when 4Gig is installed the full 4gig are=20 > avaliable to the Os, on former S939 arquitecture, depending on mem hole=20 > remapping setting in BIOS there was +/-3.5gig or 4.+Gig available for amd6= > 4,=20 > mostly the remapping feature was not existent and then there was always=20 > +/-3.5 Gig available Is there some debugging flag to turn on that shows what the firmware/BIOS says about addresses, and the final address map (both RAM and I/O devices) as used by FreeBSD? > > it could be either, or possibly both. It might work in Linux because, > > for all we know, Linux may have workarounds in place for whatever the > > problem may be. We simply do not know at this point. IIUC, Linux uses the firmware/BIOS as little as possible and does everything itself. Which is why *BSD can't run on LinuxBIOS.
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