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Date: Wed, 15 Sep 2004 15:05:34 -0600
From: Scott Long <scottl@samsco.org>
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cc: Mike Jakubik <mikej@rogers.com>
cc: DanGer <danger@wilbury.sk>
cc: current@freebsd.org
Subject: Re: ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=207594611
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Søren Schmidt wrote:
> Mike Jakubik wrote:
> 
>> Søren Schmidt said:
>>
>>
>>> You are having massive ICRC problems which are different and most likely
>>> due to bad cables/connectors or cables that are turned around (blue
>>> connector at controller, black/grey at devices), or it can be a
>>> weak/overloaded PSU.
>>>
>> This is a different error message from what everyone else, including 
>> me is
>> reporting. What about the errors we are getting?
> 
> 
> I have no idea, I can't reproduce the problem at all. However I suspect 
> somthing else is blocking interrupt delivery but its just a hunch...
> 
> -Søren
> 

I'm finding it hard to imagine a scenario where a timeout could fire but 
not a hardware interrupt.  Nothing usually shares the interrupt vectors
with ATA, so it's pretty unlikely that the ata ithread is being blocked
by anything but itself.

Scott