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Originally Posted by fccabs Thanks vegasACF |
No problem. Always happy to help.
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Originally Posted by fccabs I will probably use the computers hard drive when editing video etc but once finished will probably store the finished video on one of the external drives |
If your external drives are faster and offer enough space to allow you room to work I would strongly suggest using them for your storage both during editing and for playback. I have the benefit of using (an admittedly older) Pro Tools TDM system that does not use CPU processing power or file-based editing (for real-time effects such as reverb, compression, etc.), but uses processors on PCI cards for the necessary calculations. The benefit of this arrangement is that the CPU does little more than keeping the system and the host application running, while every other calculation is handled by processors on the PCI cards. The same funcionality is offered by extremely high-end video editing systems offered by Avid. I'm guessing, from your description, that this is not what you are using.
The upside of this is that CPUs are now fast enough to be able to do both (within limits). Video requires much more bandwidth than audio, so, while the CPU can do a great job of handling a fair amount of processing power for audio, you're going to reach the limits of the CPU with video much more quickly.
In what I imagine your situation is, the CPU is going to be handling all the processing. Any amount of processing you can take off your CPU in doing this will be greatly appreciated by your CPU (this goes for
any platform, not just the Mac side of things). As such, if you are intent on using the internal drive for housing your files while working on them, a faster drive will leave you, and your computer, much better satisfied.
Another question is going to be the throughput of whatever bus to which you have the drives attached. You could have a drive that spins at the speed of light (apologies to Einstein--I'm being hypothetical here), but if you're using a bus that crawls along at the pace of a mule pulling a plow you're going to have problems with throughput, regardless of your CPU speed or added processing power offered by PCI cards and the like. FireWire is incredibly fast, and is well-suited to these tasks. USB 2 offer nearly the same results. In my set-up, I use an admittedly antiquated, but still more than sufficient, Ultrawide SCSI bus for my high-speed drives. Its throughput is great, the drives are insanely fast, the off-CPU processors can handle pretty much anything I through at them... But I'm doing audio. Video increases bandwidth use by about 1000%.
The end question you must answer is this: Am I going to have a bottleneck, and if so, where am I going to be most happy with that bottleneck occurring? If you've got a 7200 rpm drive and are using FireWire and your CPU is up to the tasks you give it (this is always a key concern, regardless of your system), you're going to be fine. I may be going far beyond what you're going to require, in this response, and, if so, I apologize, but you may want to make note of it for the future. You may be doing completely file-based editing, and when that is the case you'll find the CPU is your biggest bottleneck. You'll have to wait for the CPU to process the effects you're wanting, regardless of the throughput of your drive bus. If you're trying to use real-time effects processing, you could find a bottleneck at any point in the chain, even with the latest, greatest gear.
Whatever your end decision, it is likely you'll
eventually run into its limitations. And you, like I, and everyone else that works in these intermingled fields, will find work-arounds. Again, my world is (largely) concerned with audio, not video. And so I have to draw my analogies therefrom. While I did much work for broadcast and cable TV networks, my work was in the audio portion of those media. But it is worth keeping in mind that for much of the Beatles' recording lifetime George Martin had what is the equivalent of today's four-track recorder (though the difference in fidelity between the wide tapes he used and cassettes that are used today in those machines is astronomical) to work with. He invented ways of making this work for his (and their) purposes. The details of this will not serve you any real purpose, so I'll forgo an explanation. But the message is important: Know the limitations of the equipment you're using, know (or create) work-arounds to make what you have do the job.
I could go on for hours about this, but I fear I'll lose your attention, so I'll stop... For now...
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Originally Posted by fccabs Will i get any benefit from the hard drive on the mac being 7200 rpm if i leave the files on the external 5400 rpm hard drive but play them through itunes on the computer??? |
What is the purpose of these audio files? Is it solely for listening pleasure? Or will these files be used in your video editing pursuits? If the former, you'll not see enough benefit to warrant the added expense. If the latter, you should strongly consider the faster drive.
I hope this helps. I hope this doesn't muddy the waters for you. But understand that there
is no single answer to your situation. Were I you, and this were how I intended to make my living, I would invest (even to the point of taking loans, if need be) in the best I could possibly afford and hope to pay off through the fruits of my labors. If it means you have to wait an extra week, month, year to get what you're wanting, so be it. Rome was not built in a day. And you'll be far better served by getting as much as you possibly can now than by ruing having not done so when you could have.