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Subject: Re: cerberus errors on 2.4.19 (ide dma related)
From: Ed Sweetman <safemode@speakeasy.net>
To: Jonathan Lundell <linux@lundell-bros.com>
Cc: linux-kernel@vger.kernel.org
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the dmesg i included shows my chipsets
 VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1
PDC20262: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI Mode.





On Sun, 2002-08-18 at 13:50, Jonathan Lundell wrote:
> At 3:26 AM -0400 8/18/02, Ed Sweetman wrote:
> >It appears then that there are some DMA issues with the promise 
> >controller i have with the driver.  My swap used to be on the drive 
> >on the promise controller before which would explain fs corruption 
> >on both drives (swap cached and such).
> 
> FWIW, this is a semi-well-known phenomenon with the IDE controller in 
> the ServerWorks OSB4 south bridge. As I recall from our testing, a 
> word appears to be dropped in the DMA transfer to the disk. We found 
> that both PIO and multi-word DMA worked OK.
> 
> What's your chipset?
> -- 
> /Jonathan Lundell.
> 


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