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Date:      Fri, 29 Feb 2008 15:39:11 -0800
From:      Stephen Hurd <hurds@sasktel.net>
To:        Ross Penner <ross.penner@gmail.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: ad0 READ_DMA TIMEOUT errors on install of 7.0-RELEASE
Message-ID:  <d582d87b7f8c.47c8271f@sasktel.net>

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> last night. It's a MiniITX board, model EN1200. My system can't remain
> up for more than 10minutes before something locks it up and frequently
> the screen will output error messages relating to DMA.

As a workaround, adding the line:
hw.ata.ata_dma="0"

To /boot/loader.conf will disable DMA and prevent the hangs that are caused by the DMA timeouts.




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