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Viable free replacement firmware is currently unknown to exist. For SSDs, the <a href="http://www.openssd-project.org/wiki/The_OpenSSD_Project">OpenSSD</a> project may be interesting.
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<p>
+ Apparently, SATA drives themselves don't have DMA but can make use of it through the controller.
+ This <a href="http://www.lttconn.com/res/lttconn/pdres/201005/20100521170123066.pdf">http://www.lttconn.com/res/lttconn/pdres/201005/20100521170123066.pdf</a> and <br/>
+ this <a href="http://www.intel.co.uk/content/dam/www/public/us/en/documents/technical-specifications/serial-ata-ahci-spec-rev1_3.pdf">http://www.intel.co.uk/content/dam/www/public/us/en/documents/technical-specifications/serial-ata-ahci-spec-rev1_3.pdf</a>
+ </p>
+ <p>
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