[paranoia] DMA problem

[Steve Smith]

Yes DMA is set on the drives.
The combination of ide-scsi, kernel 2.4.21 and 48X CDROM has so far 
removed the missing interrupt messages <dmesg>.  The cd ripping speed is 
also faster with this combination.
Win2k does not show missing interrupts in the event log. I don't know if 
Win2K logs missing interrupts.

Regards
Steve

<p>Bill Davidsen wrote:

>On Fri, 11 Jul 2003, Steve Smith wrote:
>
>  
>
>>I have similar problems. My system 1Ghz Athlon MSI K7T266. When running 
>>cdparanoia open another xterm and run dmesg. Look for missing interrupts 
>>or buffer over runs thats is what I see. I have a good experience with 
>>the 2.4.21 kernel. Using 2.4.21 and with ide-scsi emulation on both of 
>>my CD roms I can use cdparanoia on the 48X CD rom with out any 
>>problems.  My 52X CD-RW still fails with missing interrupts.
>>It is interesting to see that other than ripping CD(s) the CDroms work 
>>perfectly on my system. The problems never occur with Win2K.
>>    
>>
>
>I don't think "I don't see problems" and "I don't have problems" are quite
>the same thing, and unfortunately that's been an issue with all Windows
>flavors. The lost interrupts may be a configuration issue, shared irq,
>using softirq, etc.
>
>I don't know what Win is doing, but ignoring interrupts completely and
>polling status is not out of the question. Do you have DMA set on the
>drives?
>
>  
>

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