On Mon, Sep 17, 2007 at 01:46:01PM +0200, Tejun Heo wrote:
> failures and would really like to know what's broken. The reason can be
> one of the following two.
>
> 1. libata itself isn't doing anything wrong but using SCSI for mid and
> high level drivers are causing problems as more types of commands are used.
>
> 2. Mode programming for MWDMA is broken. This doesn't seem too likely
> as we're seeing MWDMA failures across different low level drivers but is
> still a possibility.
3 and 4
3. Libata is wrong (it is in places)
4. Old IDE uses DMA much less for ATAPI especially
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