Date: 01 Nov 2000 15:08:45 -0500 From: Arcady Genkin <antipode@thpoon.com> To: freebsd-questions@FreeBSD.ORG Subject: Re: ad0: DMA problem fallback to PIO mode; HARD READ ERROR blk#25418687 Message-ID: <87wven1mlu.fsf@tea.thpoon.com> In-Reply-To: <3A006927.D10FC9E0@telecom.ksu.edu> References: <Pine.SOL.4.10.10011011352230.16836-100000@breakout.gpcc.itd.umich.edu> <3A006927.D10FC9E0@telecom.ksu.edu>
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nathan <beemern@telecom.ksu.edu> writes: > i assume you "upgraded" fbsd recently? Not really. The box has been running 4.0 ever since it came out. 3.X before that. > make sure DMA is NOT enabled in the kernel ... that MIGHT be whats > happening, your kernel is tryin to use DMA through a non-dma channel > (your p166 onboard ctrl) How can I find out if my mobo's IDE controller supports DMA? It appears that the second disk has been running in DMA mode for months, and no problem... > i don't know what brand of mobo you have, but, being an ex-hardware guy, i've > RARELY seen onboard IDE controllers go bad.. even on OLD hardware... It's a Gygabit <sp?> with an HX chipset. Here are relevant boot-up messages: pcib0: <Host to PCI bridge> on motherboard pci0: <PCI bus> on pcib0 isab0: <Intel 82371SB PCI to ISA bridge> at device 7.0 on pci0 isa0: <ISA bus> on isab0 atapci0: <Intel PIIX3 ATA controller> port 0xf000-0xf00f at device 7.1 on pci0 ata1: at 0x170 irq 15 on atapci0 ata1-master: DMA limited to UDMA33, non-ATA66 compliant cable ad2: 13042MB <IBM-DPTA-371360> [26500/16/63] at ata1-master WDMA2 ad3: 18366MB <QUANTUM BIGFOOT TS19.2A> [37317/16/63] at ata1-slave WDMA2 Mounting root from ufs:/dev/ad2s1a It's the IBM drive that's giving me grief. That cable message, is it of any importance? I don't think the controller can do ATA-66 anyways, so I figured that DMA33 would do. Any further thoughts? > > > I just replaced a hard drive in one computer, because the previous one > > > died last night. (It was a 3.5 years old WD, so I thought that it had > > > to happen). Well, I was getting these errors with the previous > > > harddrive. Now I completely reinstalled the system, and I'm getting > > > same error messages with the new one. > > > > > > ad0: HARD READ ERROR blk# 25418671 > > > ad0: DMA problem fallback to PIO mode > > > ad0: HARD READ ERROR blk# 25418687 status=59 error=40 > > > ad0: DMA problem fallback to PIO mode > > > ad0: HARD READ ERROR blk# 25418687 status=59 error=40 > > > ad0: HARD READ ERROR blk# 25418687 status=59 error=40 Many thanks, -- Arcady Genkin Don't read everything you believe. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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