On Sunday 04 September 2005 21:18, Trevor Cordes wrote:
> I'm getting a couple of times every couple of days:
>
> Sep 1 07:09:53 piles kernel: hdq: dma_intr: bad DMA status (dma_stat=75)
> Sep 1 07:09:53 piles kernel: hdq: dma_intr: status=0x50 { DriveReady
> SeekComplete } Sep 1 07:09:53 piles kernel: ide: failed opcode was:
> unknown
>
> They're running off of the onboard Intel 845D IDE, onboard Promise PDC20276
> [...] 2 CMD680-based cards. [...] The 8 250's are all IDE masters. The 4
> 160's share 2 IDE channels (master+slave).
I had a similar problem with a SiI680 (and since lspci states that Silicon
Image was formerly CMD Tech. I thought it might be related). In my case, I
got lost interrupts and dma errors when I used both channels of the SiI680
simultaneously. I serialized both channels (kernel parameters ide2=serialize
ide3=serialize) and the problems went away (I am not sure though how much of
a performance impact it has).
If you want more detailed info on my scenario to compare it to yours, please
check bug 5145: http://bugzilla.kernel.org/show_bug.cgi?id=5145 .
Christoph Burger-Scheidlin
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