[LAU] optimal disk performance, ubuntu

Hi I hope for answers, even though my problematic application is not open source, so here goes: I haven't done any recording with ardour on this box, so I have nothing to compare with, but my DAW, energyXT, seems to dislike playing back 10+ audio tracks at the same time. I'm wondering if there are any measurements and adjustments (changing priorities of interrupts, or setting something in the lo level disk io-something) that in general would allow realtim jack clients to perform better when reading from the disc? Of course, since my DAW is closed source, it could simply just be that it is poorly written, only the author would know :-( Any input appreciated. -- Atte http://atte.dk http://modlys.dk