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Date: Tue, 29 Jul 2008 11:15:18 +0400
From: "Andrey V. Elsukov" <bu7cher@yandex.ru>
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To: "Sergey N. Voronkov" <serg@tmn.ru>
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Cc: freebsd-bugs@freebsd.org
Subject: Re: kern/120177: [ata] ATA DMA modes don't work on CF cards
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Sergey N. Voronkov wrote:
>>  Can you try to set UDMA33 or UDMA66 mode?
>>  If it will work you can try this patch:
>>  http://butcher.heavennet.ru/patches/kernel/ata/ata_limit_mode_from_device_hints.diff
>>  
>>  With this patch you can set mode in /boot/device.hints (or from loader
>>    prompt), for example:
>>  hint.ad.0.mode="UDMA33"
>>  hint.ad.1.mode="UDMA66"
> 
> This can be done a bit simpler:
> 
> echo atacontrol mode ad4 UDMA33>> /etc/rc.local

Yes, you can. But you should booted with DMA disabled first.

-- 
WBR, Andrey V. Elsukov