Date: Sat, 11 Oct 2008 13:45:45 -0400 From: Adam McDougall <mcdouga9@egr.msu.edu> To: Jeremy Chadwick <koitsu@FreeBSD.org> Cc: freebsd-stable@freebsd.org, freebsd-amd64@freebsd.org Subject: Re: am2 MBs - 4g + SCSI wipes out root partition Message-ID: <48F0E649.20808@egr.msu.edu> In-Reply-To: <20081011165250.GA67552@icarus.home.lan> References: <200810101429.37244.joao@matik.com.br> <20081011113057.7402300c@ernst.jennejohn.org> <20081011101316.GA58119@icarus.home.lan> <20081011164529.198f32c6@ernst.jennejohn.org> <20081011144817.GB64861@icarus.home.lan> <48F0D3B5.6070602@egr.msu.edu> <20081011165250.GA67552@icarus.home.lan>
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Jeremy Chadwick wrote: > On Sat, Oct 11, 2008 at 12:26:29PM -0400, Adam McDougall wrote: >> Jeremy Chadwick wrote: >>> On Sat, Oct 11, 2008 at 04:45:29PM +0200, Gary Jennejohn wrote: >>>> On Sat, 11 Oct 2008 03:13:16 -0700 >>>> Jeremy Chadwick <koitsu@FreeBSD.org> wrote: >>>> >>>>> On Sat, Oct 11, 2008 at 11:30:57AM +0200, Gary Jennejohn wrote: >>>>>> On Fri, 10 Oct 2008 14:29:37 -0300 >>>>>> JoaoBR <joao@matik.com.br> wrote: >>>>>> >>>>>>> I tried MBs as Asus, Abit and Gigabyte all same result >>>>>>> >>>>>>> Same hardware with SATA works perfect >>>>>>> >>>>>>> Same hardware with scsi up to 3.5Gigs installed works perfect >>>>>>> >>>>>>> what calls my attention that all this MBs do not have the >>>>>>> memroy hole remapping feature so the complete 4gigs are >>>>>>> available what normally was not the case with amd64 Mbs for the >>>>>>> Athlon 64 CPUs >>>>>>> >>>>>>> some has an opinion if this is a freebsd issue or MB falure or >>>>>>> scsi drv problem? >>>>>>> >>>>>> It's a driver problem. If you want to use SCSI then you'll have to limit >>>>>> memory to 3.5 GB. >>>>> What you're saying is that Adaptec and LSI Logic SCSI controllers behave >>>>> badly (and can cause data loss) on amd64 systems which contain more than >>>>> 3.5GB of RAM. This is a very big claim. >>>>> >>>>> Have you talked to Scott Long about this? >>>>> >>>>> Please expand on this, and provide evidence or references. I need to >>>>> document this in my Wiki if it is indeed true. >>>>> >>>> See the freebsd-scsi thread with Subject "data corruption with ahc driver >>>> and 4GB of memory using a FBSD-8 64-bit installation?" from Wed, 30 Jan >>>> 2008. >>>> >>>> This was for ahc, but the bit-rot which Scott mentions in his reply might >>>> also apply to the LSI Logic controllers. >>>> >>>> Basically the driver doesn't correctly handle DMA above 4GB. Since the PCI >>>> hole gets mapped above 4GB it causes problems. the (S)ATA drivers don't seem >>>> to have this problem. >>> Thank you -- this is the exact information I was looking for. >>> >>> I will update my Wiki page to reflect this quite major problem. >>> >> I am using some LSI (mpt driver) ultra4 (U320 scsi) and LSI SAS >> controllers in FreeBSD 7.x amd64 with 20G of ram, and Adaptec (aac >> driver) with a 5th generation RAID card with 8G of ram, both have no >> such corruption problems. Providing this as a counter-example just to >> document some evidence of which products seem to work fine. > > Is your LSI SAS controller driven by mpt(4) or mfi(4)? > > Let's break down what we know for sure at this point: > > aac(4) - not affected > aha(4) - unknown > ahb(4) - unknown > ahc(4) - affected > ahd(4) - unknown; no one answered the OP's question in the thread > asr(4) - unknown > ips(4) - unknown > mpt(4) - not affected > mfi(4) - unknown > sym(4) - unknown > > Could the problem be specific to certain firmware revisions on the > cards? > > Also adding Scott Long to the CC list. > All the LSI I reported is driven by mpt, I have no mfi devices.
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