dd supports writing to multiple devices at once, but not reading from multiple inputs. On Sat, Oct 17, 2009 at 7:12 PM, Asdo <asdo@xxxxxxxxxxxxx> wrote: > Tomasz Chmielewski wrote: >> >> If you start using your drives for two "dd if=bigfile[12] of=/dev/null" at >> the same time, you will notice the difference. > > OT: Does this dd line really work? I did see it elsewhere already but > doesn't appear to work for me: seems to see only the last if=. I don't think > multiple input or output files are supported. > For this kind of tests I was doing a for loop with background dd comands ( > trailing & ) IIRC > This would be a good dd feature to simplify linux-raid performance testing > though. > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Majed B. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
