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Date: Tue, 01 Feb 2005 04:47:31 +0100
From: cpghost <cpghost@cordula.ws>
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To: Francisco Reyes <lists@natserv.com>
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cc: Santo Natale <sannata@tin.it>
cc: FreeBSD Questions List <questions@freebsd.org>
Subject: Re: WRITE_DMA UDMA ICRC ERROR
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Francisco Reyes wrote:

>
> On Tue, 1 Feb 2005, Santo Natale wrote:
>
>> check if yours new hd is connected through a 80 pin ide cable ( for 
>> UDMA speed >= 66 ).
>
>
>>> Jan 30 12:52:24 zoraida kernel: ad2: WARNING - WRITE_DMA UDMA ICRC 
>>> error
>>> (retrying request) LBA=52551839
>>> Jan 30 13:08:36 zoraida kernel: ad2: WARNING - WRITE_DMA UDMA ICRC 
>>> error
>>> (retrying request) LBA=88194655
>>
>
>
> In the mean time how could I decrease the UDMA setting so it operates 
> at a lower speed?


Use atacontrol(8):

# atacontrol mode 0
Master = UDMA66
Slave  = BIOSPIO

# atacontrol mode 0 udma33 biospio

# atacontrol mode 0
Master = UDMA33
Slave = BIOSPIO

> It probably will be a few days before I get to stop by the computer 
> store.
>
> Most lines are simply warnings, but there area a few errors. This is 
> just a backup drive (ie every X number of hours backup some data from 
> my primary drive) so it's not too much of a problem to slow it down 
> temporarily.

They are warnings, but a UDMA speed mismatch can bite you when you least 
expect it :)

Cheers,
-cpghost.

-- 
Cordula's Web. http://www.cordula.ws/