Disk reliability (Was: Node cloning)

[Mark Hahn]

> P.S.  You need at least UltraDMA mode 2 to get CRC protection (=> you do
> not want to turn off DMA without a really good reason).  Lower modes
> (PIO or multiword DMA) do not have CRC protection.

afaik, there do exist UDMA modes 0 and 1 - they're not commonly used,
but they're valid, and should definitely have the same benefit of CRC.


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