Hello

Just thought i would fill you in on my findings.

I have tried a setup using a Mac Pro, Dual Quad 3.0Ghz, 4GB RAM, with an ATI Radeon X1900XT, outputting the video at 1024x768 on DVI to a second display.

I have then setup two video drives,

1 - 150GB 15000rpm SCSI Drive
2 - 2x150GB 10000rpm SATA Drive, In Raid 1 (Mirrored)

I am using the latest release of Catalyst, and all the current updates from Apple.

All test conducted with DV footage, motion JPEG to follow

Results:
SCSI
DV at 720x576 - 5 Layers till frames dropped
DV at 1024x768 - 4 Layers till frames dropped

SATA
DV at 720x576 - 5 Layers till frames dropped
DV at 1024x768 - 4 Layers till frames dropped

This is with no processing and playing full screen, not that it matters as teh CPU never went above 20%.

Cheers

Gareth