From owner-freebsd-questions  Sat Apr 28 20:28:50 2001
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Date: Sat, 28 Apr 2001 23:12:08 -0400
From: trini0 <trini0@optonline.net>
Subject: Re: how to disable udma mode
To: Alexander Tatsyuk <alextats@hotmail.com>
Cc: questions <questions@freebsd.org>
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I believe if you man ata youll find out how to enable/disable dma...


Alexander Tatsyuk wrote:

> I heve a problem. Sometimes there is error message appear:
> 
> "ad0: UDMA ICRC READ ERROR blk#.......retrying" (can appear several 
> times together)
> 
> "ad0: UDMA ICRC READ ERROR blk#....... falling back to PIO mode"
> 
> How to fix this problem without disabling ultra DMA mode, or what string 
> should I add or remove in my kernel configuration file to disable ultra 
> DMA mode support to HDD at startup?
> 
> Thanks.


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