Date: Wed, 01 Nov 2000 14:22:05 -0600 From: nathan <beemern@telecom.ksu.edu> To: Arcady Genkin <antipode@thpoon.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: ad0: DMA problem fallback to PIO mode; HARD READ ERROR blk#25418687 Message-ID: <3A007B6D.CC73786B@telecom.ksu.edu> References: <Pine.SOL.4.10.10011011352230.16836-100000@breakout.gpcc.itd.umich.edu> <3A006927.D10FC9E0@telecom.ksu.edu> <87wven1mlu.fsf@tea.thpoon.com>
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Arcady Genkin wrote: > > 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 hear what you're saying... however, the 82371SB (430HXchipset) only supports ATA/16 (ie. PIO Mode 4 -- NOT UDMA) you can verify this at: http://developer.intel.com/design/chipsets/drivers/busmastr/ you can go into your BIOS(CMOS) and it should list exactly what its detecting your harddrives at, like transfer mode, size, etc it'll prolly be like PIOMode4, and LBA enabled... > > 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. any chance you could take a peek inside your box and get exact make/model? or it might show up on POST (this is why i never 'cover' my boxes) > 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. well... it WON'T if your controller doesn't support it ): > Any further thoughts? rebuild your kernel withOUT DMA and see what happens good luck! nathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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