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Re: DMA woes

Michael P. Soulier sez:
} On 17/12/02 Gregory Seidman did speaketh:
} > Thank you, I know. And it was. I even indicated it by including the #
} > prompt instead of the % prompt.
}     Is this a custom kernel? You need support for your IDE controller
} before this will work. See if it's recognized at boot by checking the
} dmesg output. 

% dmesg | grep -i ide
ide0: unexpected interrupt, status=0x58, count=1
ide0: Speed warnings UDMA 3/4/5 is not functional.
ide0: Speed warnings UDMA 3/4/5 is not functional.
ide0: unexpected interrupt, status=0x58, count=2

Something is clearly wrong. However:

# hdparm -i /dev/hda | grep -i dma
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 DMA modes: mdma0 mdma1 *mdma2 udma0 udma1 udma2 udma3 udma4 udma5 

I don't know I need to compile into the kernel to get support for my IDE
controller (partly because I don't know much of anything about my IDE
controller). All I know is:

% lspci | grep IDE
00:1f.1 IDE interface: Intel Corp. 82801DB ICH4 IDE (rev 01)

}     Mike

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