Re: Compact Flash performance...

[Mark Lord]

Jeff Garzik wrote:
> Mark Lord wrote:
> > Some cards may perform better when their "memory" interface is used
> > instead of the "I/O" interface, or vice-versa.  I'm not sure which
> > of the two methods was selected by libata (probably the "memory" 
> > interface).
>
> I am very CF-ignorant.  How does libata select a memory or I/O interface 
> on a CF device?

Right.  Usually we cannot select them, as it's the wires between
the ATA chipset (motherboard) and the CFCARD that determine this.

So I suppose this means that most implementations are using the I/O access method,
except for some embedded systems where the CFCARD is wired to the host bus
without a separate "controller" chip in between.

Cheers
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