[LAU] optimal disk performance, ubuntu

[Lee Revell]

On Wed, Nov 19, 2008 at 5:16 PM, Atte André Jensen
<atte.jensen at gmail.com> wrote:
> 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?

What format are the tracks in?  16 bit, 44.1Khz is 0.7MB/sec per track
which any drive
should be able to handle 10 tracks of.  But with 96Khz and 24 or 32
bit samples, you
could be pushing the limits of the drive.

What does running hdparm -Tt on the block device (/dev/sdX) give you?

Realtime tuning should not matter because with any sanely written DAW the disk
IO will be done in it's own non-RT thread.

Lee