Alex Gerulaitis
Forum Replies Created
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[Dave LaRonde] “It was mentioned.”
Could you elaborate on that?
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[Richard Jacana] “On paper the 7D footage should tax the computer less?? Guess it’s because h.264 is an inter-frame codec?”
H.264 is a codec that’s efficient on space – i.e. maximum quality in the minimum bits possible. You’re right: it’s inter-frame, i.e. a group of frames is encoded together; to decode a single frame, the whole group must be decoded.
ProRes is an intra-frame codec that is much less efficient in terms of space, but is much less taxing on computer.
An inter-frame such as H.264 can easily be 10 times more efficient than an intra-frame one like MJPEG, ProRes or DV, e.g. a 100Mbit/s ProRes stream could be encoded into a 10Mbit’s H.264 w/o significant loss of quality.
HTH
Alex (DV411)
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Also, once you are done with data recovery attempts, and if any of the data on the server is critical, consider beefing up your data resiliency. It’s a combination of appropriate redundancy plus on- and off-site backup.
Alex (DV411)
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You’re right, RAM is the first thing to look at. But even before that, a couple of things:
– does your memory utilization get close to 100%? Check in Windows Task Manager or Resource Monitor.
– What are your memory allocation settings in Pr? (Preferences – General)
– What is the sequence preset you are using?Alex (DV411)
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George,
Go to https://www3.hp.com/t5/ProLiant-Servers-Netservers/bd-p/bsc-431“>HP support forums, have your RAID controller model number ready as well as your hard drives’ part numbers, post your question there.
There is a very slim chance of data recovery – you need to follow HP techs’ advice and controller docs to pursue it.
Alex (DV411)
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[Andrew Richards] “You lost your data when the second drive failed. Everything after that is moot. Sorry. “
Andrew, there is a small possibility of data recovery is the drive(s) was/were marked offline, together with the whole volume. The drive may be OK but say if it doesn’t respond within a certain timeout set by a controller, the controller marks it offline. If there is no redundancy left to work with, the controller marks the whole volume offline. If the drive is actually healthy, re-inserting it sometimes does the magic trick of putting it back online; and sometimes, there is more to it than just re-insertion.
I’d recommend:
– researching the RAID controller docs (P400?) for exact steps in trying to bring the drive(s) back online
– go to HP support forums – lots of very knowledgeable folks there – see if they have advice.Alex (DV411)
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[Simon Dinnigan] “I was just at bit concerned about the reports of SSD’s degrading due to the Mac OSX not having the TRIM facility. Any thoughts?”
Ask Apricorn: the array is managed by their own BIOS, not Max OSX directly. They may have implemented TRIM at the controller or driver level. I haven’t found anything in their specs though.
Alex (DV411)
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The drive is fast enough over FW800 to handle ProRes 422 HQ easily. Over FW800, it’s about as fast as an internal 7200rpm drive on MBP, and a bit faster than a 5400rpm one.
Alex (DV411)
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Kevin, based on the fact you are using EditShare tells me you are using standard GigE Ethernet – does that sound right?
What is the EditShare model you are using?
Alex (DV411)
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[Simon Dinnigan] “Question is: anybody had a chance to put one of these through their paces? Pros and Cons?”
Apricorn specifically – no; SSDs – yes.
There is a definite “wow” factor in boot times, still image editing, launching applications – but this is more of a “wow” thing than any measurable productivity.
The benefit is pretty insignificant for video editing applications with the exception of short sequences of ultra-hi-res (4K, 5K) uncompressed files.
Three internal spinning drives in RAID0 will have data rates of 200-400MB/s on a Mac Pro with a 6TB capacity for less than $600. So it 10 times the capacity at half the price with half the speed – or 20 times the money for only twice the speed.
Granted, to get that kind of a speed from spinning drives, it will cost quite a bit more than $1400: the controller and the 8-bay box will run about $1.6K before you add drives. So if you have to have that speed (but not the capacity or redundancy) – SSDs (and Apricorn) make sense.
Alex (DV411)