Re: stupid SATA questions

[Jeff Garzik]

Kumar Gala wrote:
> These questions were posed to me and I was hoping someone would have 
> better knowledge about the works and usage of SATA then I do.  All of 
> these questions are around understanding how important the performance 
> of PIO mode is.
>
> How often would one run in PIO mode?  Why would one run in PIO mode?

Never.  No idea.  :)

Unless you have a broken device, or a command that cannot work with DMA 
(such as IDENTIFY DEVICE), PIO mode is quite pointless.  It is emulated 
under SATA, turned into FIS's on the SATA bus.

	Jeff



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