2008/2/17, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>: > On Sun, 17 Feb 2008 16:41:42 +0100 > Joris <joris@xxxxx> wrote: > > > Hello List, > > > > Odd problem on my machines: the sata disks appear to be a lot slower > > when used via ata_piix vs the ahci driver. > > I would expect that. AHCI allows the use of NCQ and unloads a ton of work > from the processor. It also means you pretty much avoid the inter command > latency that limits standard IDE performance. Alan, >From your response I'm not sure if I made clear that ata_piix was faster, and ahci slower? Am I interpreting this correctly as having to choose between fast iops with low cpu (+ hotplug) with ahci and twice the linear read speed with ata_piix? Kind regards, Joris - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
