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Originally Posted by taylorjheinzen
Been trying all week to regress my OS back to 10.10.3 in hopes that being "fully compatible" would solve the problem, but had no luck. Crashed about 7 times in the past 4 days, all with no particular task happening. Completely random every time. I wiped my drive and reinstalled the factory OS that came with my Mac (10.10.3) through an internet recovery boot up, but after several tries, it remained at 10.10.5. An Apple "specialist" claimed that Apple deleted 10.10.3 from the servers...
Planning to replace the drive, not sure it's a job I'm wanting to go after, so I'll outsource it. However, a lot of Mac forums highly advised not putting any drive other than a fusion drive in a computer that left the factory with one so I'm a little wary. Also considering just spending the cash to go to 12, buy my money's on the drive sadly.
I guess my question is, what's the deal with Fusion Drives and PT? While I understand PT is a program more complex than any of us understand, it's the only program that hasn't played so nice with the system drive. Ableton, StudioOne, MainStage, and Logic X all run true. Any insight on the technical reasons why the two don't mix? I see people all over this forum completely against them. I'm not partial to it all, just curious.
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One of the problems with a Fusion drive is it, on it's own, swaps data & stuff from the spinner to the ssd and back to the spinner. Imagine trying to record something on two tape recorders, one at a time, and having someone switch between which one is recording as they feel like. That's basically what a Fusion drive does but a bit more sophisticated. Data can get missed and recording slowed down.
Yours is the first I've ever heard about not replacing a Fusion drive with anything other than another Fusion drive. The biggest problem with replacing drives in Macs especially iMacs and Mini's is getting one with the correct temperature sensor connections. Get that wrong and the fan(s) will spin at high speed all the time.
Just because some programs seem to work okay with a Fusion drive doesn't mean they'll all play nice together.
Internet recovery will only work with what's available to it and doing a restore that way, even though your machine originally came with a lower OSX version, will always get you what's available. This is a good reason to always make a clone of a working system; drives are cheap and so is the s/w to do a clone. Carbon Copy Cloner is my tool of choice for that and it's saved me a number of times.