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intermittent dropped frames on 2 drive raid.
I have:
G5 2.3, 2g mem/FCP 4.5/Aurora PipeStudio/Seritek1v4 internal/two SATA SeaG 300g 16cache in an apple striped software raid to 550gigs.
I have also tried 2 Max 250g striped as well. all new equipment and updated driversWork flow:
Beta deck component to PipeStudio Uncompressed capture at about 20 MB/sec. I benchmarked the raid with FWB DriveTest at a sustained
write of 60MB/sec and a sustained read average of 75MB/sec.Problem:
I get a random ‘dropped frame’ stop of capture all the time. So I press the Try again a couple of times and it ramdomly decides it will capture
the section even a long piece of a minute or two. I have played back multiple streams in FCP uncompressed and unrendered at no problem
but the capture is giving me headaches because I have to babysit batch capture and keep pressing try again. It always errors when I first start
the batch but I thought that was because the drives were spinning up. but it does it even after that on small 3 sec captures and long ones as well.
But then I can keep pressing try again and it sometimes decides a 1 minute piece is no problem and moves on to the next small piece only to
error again. Rhyme or Reason is undetected here and I have tried other drives and a different raid card(laCie) as well with same results or worse.Questions:
Is this work flow suppose to work? Does anyone else use this kind of setup without problems? Does anyone capture Beta through a PipeStudio
Uncompressed with a 2 drive array instead of a 4 drive array? I’ve updated drivers, Firmware, versions.
Thought I was going to beat the Big external 4 drive array system cost with the 2 drive internal, Am I a dreamer?Thank you all who read and ponder…whether you have a comment or not these boards help us all eventually, thank you for them.
Mark.
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2 Replies
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not clear – do you have your system software living on this internal raid setup as well? If you do, that would be the 1st culprit I’d look into.
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The system software is still on the 250g drive that came with the G5
For those that may wonder how I have an internal raid + the system disk
I have setup a mount on the base of the G5 behind the two big fans for
extra hard drives similar to the Swiftdata 200 but I used standard drive
mounts modified by a dremel tool to make them attach to the base plate
which is attached to the G5 base.
Thank you for the possible culprit Charlie, Have you heard of a 2 drive array
working fine for betacam uncompressed capture?
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