Re: SATA speed. Should be 150 or 133?

[Krzysztof Oledzki]

On Thu, 23 Jun 2005, Mark Lord wrote:

> True SATA drives ignore the "transfer speed",
> as it really is meaningless and does not apply.
So, am I the the only person confused by this message? ;)
There is "SATA max UDMA/133" not "PATA max UDMA/133".

> But most (all?) first-gen SATA drives are really
> PATA drives with a SATA bridge built-in.
> Some of those drives require that Linux set the
> DMA transfer speed for them to work reliably.
Oh, so how to check true (current) speed?

> Last I looked, the highest valid PATA transfer
> speed was still "UDMA/133".  150 just plain
> doesn't exist for PATA (and the whole concept
> doesn't exist for SATA, so ..)
OK :)


Best regards,

				Krzysztof Olędzki