Date: Tue, 4 Dec 2001 21:40:06 +0100 From: "Steve O'Hara-Smith" <steve@sohara.org> To: "Daniel O'Connor" <doconnor@gsoft.com.au> Cc: Cy.Schubert@uumail.gov.bc.ca, freebsd-stable@FreeBSD.ORG, sos@freebsd.dk Subject: Re: mmap busted in 4.3? Message-ID: <20011204214006.23420a3c.steve@sohara.org> In-Reply-To: <XFMail.20011119000054.doconnor@gsoft.com.au> References: <200111181534.fAIFY5E02204@cwsys.cwsent.com> <XFMail.20011119000054.doconnor@gsoft.com.au>
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On Mon, 19 Nov 2001 00:00:54 +0800 (WST) "Daniel O'Connor" <doconnor@gsoft.com.au> wrote: DO> DO> On 18-Nov-2001 Cy Schubert - ITSD Open Systems Group wrote: DO> > I think that there's a greater possibility of a hardware problem. I DO> > bet it's memory. Also, there are some reported problems with data DO> > corruption using the VIA KT133A chipset. The problem appears to be DO> > with the 686B Southbridge chip. DO> DO> X-( DO> DO> Guess what chipset it's on? DO> The dd copies have had 1 error so far.. I have applied Søren Schmidts fix(1) for this to my -stable system with a VIA KT133A/686B (Jetway 663AS MB) and it has fixed my sure fire test case (dd if=/dev/ad0 of=/dev/null bs=1024k - would crash after about 20Gb and make funny noises rather earlier - now runs smoothly to the end of the 30Gb drive). Question for Søren, I know of (via USENET) some people who seem to be much more severely afflicted, is there any good reason why I shouldn't offer them this as a patch ? On a related note, the interface speed for this box seems to be around 47Mb/sec (using the 5 runs of dd the first half megabyte test), the drive is an IBM DTLA 307030. (1) OK workaround - it's the same code (via686b routine and conditional call) as -current but in ata-all.c instead of ata-pci.c. -- C:>WIN | Directable Mirrors The computer obeys and wins. |A Better Way To Focus The Sun You lose and Bill collects. | licenses available - see: | http://www.sohara.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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