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Re: Promise or VIA?

A Dimecres 22 Setembre 2004 15:38, Paul Brook va escriure:
> On Wednesday 22 September 2004 14:11, Leopold Palomo-Avellaneda wrote:
> > Hi,
> >
> > I have MSI K8T Neo Series Mainboard, and a SATA HD. This HD can be pluged
> > or to the Promise 20378 controler (RAID if you have more than one) or to
> > the VIA® VT8237.
> >
> > I think, that the Promise controler has a transfer rate up ot 133MB/s and
> > the Via chipset 150MB/s transfer rate [1]. Howeber, also I have found
> > that this value can differ a lot depending of the driver (as always...).
> > I would like to know if someone that some experience with these chipsets
> > and which one recommends knowing the driver under Debian amd64 port. I
> > only have one HD and I can plug it to the VIA or the Promise.
> I think you are misreading the specs. Both controllers have theoretical
> maximum bandwidths of 150Mb/s and 133MB/s for SATA and IDE ATA133 busses
> respectively.
> All of which is fairly academic for two reasons:
> 1) The maximum throughput of modern drives is only 50-60Mb/s. Ie. nowhere
> near the interconnect bandwidth.
> 2) Both controllers will probably be connected to the same 133Mb/s (32-bit
> 33MHz) PCI bus. That class of motherboard is unlikely to have a PCI-X bus.

Actually I have the hd connected to the Promisem and when Linux boot, the 
driver says that the transfer is 133MB/s.

I don't understand one thing, if the controller is on the mainboard, no in a 
board connected to the pci bus, the information goes throught the pci BUS?

Best Regards,


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