On Sun, 02 Sep 2007 13:51:43 +0100 Matt Sealey <matt@xxxxxxxxxxxxxx> wrote: > Hi guys, > > Does anyone have any decent information on the purpose, performance potential > or perhaps quirks of the "read prefetch" and "post write" buffer features on > some IDE chipsets? > > It doesn't look like any standard but at least is included in quite a few > of the libata drivers, and a lot of x86 BIOS control has toggles to try and > turn it on or off. > > But, what is it? I've never seen any documentation but which register to use > to toggle it.. no vendor recommendations to turn it on, it seems like a rather > secret feature..? Chipset specific. Some public documentation discusses it for certain chips (eg the Intel ATA tuning guidelines). For others you may need the BIOS vendor manual or similar. Alan - 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
