> > Since you don't do a reset is it not sufficient to check word93 on the
> 
>     Ah, you mean to identify a SATA drive?  Need to try this...

That is the basic approach libata uses, and I've been runnin for a while
with patches to actually pick this case up and flip the cable type as
well. PATA controller/SATA drive rather gives away the presence of a
bridge, although which end is one thing I've yet to work out a way to
probe

> > initial identify scan in PIO. Or if you do a reset the signature.
> 
>     Hm, the taskfile signature, you mean?..

Yes because that is if I remember rightly also different for a SATA device
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