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dropped frames, slow raid write rates

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Jason Longodropped frames, slow raid write rates
by on Jun 28, 2009 at 6:31:07 pm

Hi Folks.

I have a dual 2.7 G5 with a Kona LH card, breakout box, and an 8 drive Sata Raid. I used this system a couple of years ago to online an HDCAM project and it worked perfectly.

THis weekend I tried to digitize some uncompressed HDCAM footage into FCP and inexperienced dropped frames. I tried it using the Kona capture application and had the same problems. I erased everything on my Raid array, so I have 2TB of free storage. When I ran the AJA system test without the "Simultaneous KONA DMA" box checked, I get write rates of 160mb/sec and read rates of 215 mb/sec. When I check the "Simultaneous KONA DMA" box those rates drop to Write 44mb/s and read 98mb/s.

Any thoughts?

With those slow write rates it's impossible to import any HDCAM into my system without dropped frames.

POwermac G5 Dual 2.7
10.5.7

Jason




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