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Mac Pro Dropping Frames….
I have a Mac Pro (Dual 3.0 4 gigs of Ram. FCP 5.1.4, 250 gig system drive, 3 500 gig media drives, two of which are striped together into two partitions Kona LHe).
The computer shows all the expected speed improvements over my G5, but when I lay my show to tape, (1hr rendered 8bit uncompressed) It will always drop frames and stop somewhere in the program. It will even do this with DV timelines! I thought I had a disk problem so I made a Final Cut Movie and copied it to the 3rd (unstripped drive) and tried to layback from there. Same Problem! I ran AJA’s disk perfomance program and found the expected numbers with some spikes going down to zero, which could be the problem, but it’s on all the disks. Energy saver prefrences are set to never and “put disk to sleep when possible” is disabled. I think I either have broken computer or a setting problem. Any ideas? -
6 Replies
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[Don Walker] “3 500 gig media drives, two of which are striped together into two partitions”
Don,
Its the partitions you mentioned above that raise my eyebrows slightly. They shouldn’t be a factor, but they can be a factor, making disk reads slower than they would be otherwise. Try simply striping the two drives together as one single large drive and see if that solves your issue.
David
David Roth Weiss
Director/Editor/Post-production Supervisor
David Weiss Productions, Inc.
Los Angeles -
I have the same problem of inevitable dropped frames on my Mac Pro, with a raid 0 set of 3 Seagate 750s. I sometimes even drop frames trying to play back a single clip of audio only! AJA numbers look great but there are spikes on the graph down to very low speeds. You’d think this would be related the problem, but how do we fix it? I am simply unable to play through my project smoothly ever. I, too, hope it’s a setting somewhere, but so far no enlightenment has come.
Mike
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Well, Mike…. I have some questions for you. What is your Easy Setup? How are your drives striped? Do you have them Journaled?
As for Don Walker…. Reformat your drives. Now, are these 3 500 gig drives used to video editing only OR is one of these used for your system drive. If you are using all three for editing, stripe all three together into ONE volume. This will solve your problem.
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Wayne Carey
Schazam Productions
http://www.schazamproductions.com
https://blogs.creativecow.net/waynecarey -
Well, Mike…. I have some questions for you. What is your Easy Setup? How are your drives striped? Do you have them Journaled?
Hi, Wayne,
The same thing happens in several different setups. One is DVCPROHD, another is HDV. Both are custom setups to take all the easy setup parameters except that the video plays back in 8-bit 1080i through the Kona 3. My 3 Seagate drives are striped Raid 0 into one volume. They are not journaled. The volume is less than 1/2 full.
Thanks for any ideas you may have,
Mike
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Not certain if this will help or not (your system sounds far more advanced than mine) … but info from Apple help area indicated that on CAPTURE (didn’t mention write to tape) that Spotlight was causing dropped frames in OSX 10.4.9. Fix was to put the Capture Scratch folder in the Spotlight (PRIVACY TAB in the System Prefs) … I was having all kinds of dropped frame problems, and put the entire drives that I was using in the Spotlight privacy area, and they all went away. Maybe you need to do the same for your rendered file outputs? Just a thought.
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Try this. reset SMU https://docs.info.apple.com/article.html?artnum=304123 Also zap the PRAM. I had the same problem on a system of G-Raids that worked fine on a Powerbook but not on the Mac Pro. Re-cabling, DiskWarrior, Permissions, nothing fixed the problem until I reset the SMU.
David
Edit One, Inc.
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