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serr · 01-17-2018, 09:24 AM

Hmmm...

Sanity check time!

Two things:
1. Go back to much earlier than OSX 10.12 and test the system again. 10.6 even! At least 10.10 or 10.11 though.

2. Let's just play dumb and shake that new computer down. What is the smallest block size that you end up at for stable operation? And JUST for playing files back! (No plugins.) Test this with both the internal SSD and your external USB drive for the data point. (What I mean by "play dumb" is forget you know that you are setting the block size high based on experience with other systems and just see what the stable value you end up with is.)

Maybe run a speed test on the internal SSD. (Maybe even do this first.) Could be a comedy of errors like a fluke bad SSD and then the USB connected drive was simply too low performance for the job. So... it seemed like nothing works. I'm not placing bets on this one but it's worth ruling out.

01-17-2018, 09:24 AM	#25
serr Human being with feelings Join Date: Sep 2010 Posts: 12,634	Hmmm... Sanity check time! Two things: 1. Go back to much earlier than OSX 10.12 and test the system again. 10.6 even! At least 10.10 or 10.11 though. 2. Let's just play dumb and shake that new computer down. What is the smallest block size that you end up at for stable operation? And JUST for playing files back! (No plugins.) Test this with both the internal SSD and your external USB drive for the data point. (What I mean by "play dumb" is forget you know that you are setting the block size high based on experience with other systems and just see what the stable value you end up with is.) Maybe run a speed test on the internal SSD. (Maybe even do this first.) Could be a comedy of errors like a fluke bad SSD and then the USB connected drive was simply too low performance for the job. So... it seemed like nothing works. I'm not placing bets on this one but it's worth ruling out.