Optimizing Mac OS9 MDD for recording multiple audio inputs.

[Architecture]

All,

I have decided to use Mac OS9 as my main DAW setup for my studio. For the longest time I have mainly worked with 2 channel at a time recording and got by great. I am planning to run at least 34 channels in and 34 channels out using a RME Digiface and Multiface. A Mackie 32-8 will be feeding the G4 a variety of inputs from my setup as needed.

I have 2 OWC 120GB SSDs on the ATA/100 bus, one for OS9 booting and the other for recording. I recently acquired a Seritek 1SE2 and external enclosure running a 480GB Inland SSD. Running Norton System Info, my overall disk performance was less than the SSDs on the ATA bus. On the PCI bus I am running 2x RME HDSP PCI cards, Seritek 1SE2, Adaptec 2906 for Sampler management.

Logic 5/6 seem to use a lot of Disk I/O on a few channels while I can run up to 32 mono channel projects on Cubase VST with 20% disk usage. Any tips on getting Logic 5/6 to match the performance of VST? I like VST but projects made on it don’t transfer over as well to newer versions in my experience.

[IIO]

do you have different track buffer sizes in cubase and logic? there is a difference, but it should not be >5:1.

what stresses disks the most is reading and writing at the same time (plus reading might be reading a lot of small files), otherwise recording 32 tracks is not a problem at all, and RME or motu are working systems for that kind of thing.

[Architecture]

I was running with 256kb buffer per track and 3ms latency on VST/32. Having to move up the latency on Logic 6 but not sure how to achieve the same buffering I had in Cubase.