Date: Mon, 13 Oct 2008 14:50:54 +0200 From: Gary Jennejohn <gary.jennejohn@freenet.de> To: JoaoBR <joao@matik.com.br> Cc: freebsd-stable@freebsd.org, freebsd-amd64@freebsd.org Subject: Re: am2 MBs - 4g + SCSI wipes out root partition Message-ID: <20081013145054.3b458aea@ernst.jennejohn.org> In-Reply-To: <200810130935.10570.joao@matik.com.br> References: <200810101429.37244.joao@matik.com.br> <20081011113057.7402300c@ernst.jennejohn.org> <20081011101316.GA58119@icarus.home.lan> <200810130935.10570.joao@matik.com.br>
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On Mon, 13 Oct 2008 09:35:10 -0200 JoaoBR <joao@matik.com.br> wrote: > On Saturday 11 October 2008 07:13:16 Jeremy Chadwick wrote: > > It's a driver problem. If you want to use SCSI then you'll have to limit > > memory to 3.5 GB. > I probably should have written - it seems to be a problem with ahc. In general SCSI seems to work, as Scott has recently documented. But see below. > > well indeed with less then 4G installed it works flawless, so the difference I > see is that former athln64 MBs had memory hole remap options or when 4Gig > installed they only gave 3.something to the OS even under amd64 - this is NOT > the case with the AM2 MBs which should support up to 8/16Mb onboard but wth > this amount freebsd amd64 does not even boot when a scsi adaptor is installed > I'm beginning to believe that it's motherboard/BIOS related and not a general problem with ahc or any other SCSI driver. I can say that at least with my Gigabyte GA-M61P-S3 I observed data corruption with 4GB of memory installed and with the BIOS mapping a part of memory above 4GB. Forcing the kernel to use only 3.5GB solved the problem. --- Gary Jennejohn
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