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In Reply to: RE: What about keeping a USB DAC and an external HD on different busses? posted by AbeCollins on October 31, 2016 at 22:08:50
Thanks, Abe.
That is what I do now with my USB buses. But I wonder how many USB-C controllers there are supporting those 4 ports and how many internal devices, such as keyboard, trackpad, FaceTime camera, etc. are also using them. I deal with that issue now, but it helps that I can put my music on an external HD on a firewire/thunderbolt connection and keep it off of the USB bus. If all peripherals now have to go through the USB-C controllers, with various adapters, it appears to me that it would further complicate the issue of isolating my USB DAC on its own USB controller.
Cheers,
Bill
Follow Ups:
Like your current USB ports, you can choose different USB controllers for different devices and view and verify them in your System Report. I suspect you'll have the same separation and ability across the different USB-C/Thunderbolt ports. The only true way to know is with System Report on the new MacBook Pro.
I have 2 Late 2014 Mac Minis the first I bought 2 years ago and the second just 2 months ago. The older mini which runs Yosemite has High Speed, USB3 Hi-Speed and a USB3 SuperSpeed listed in it's USB System Report.
The newer Mini runs El Capitan and only lists a single USB 3.0 Bus. I used to have my Music stored on the only USB drive connected to the Mini which was listed under SuperSpeed, but now with the apparent disappearance of that option I am at a loss as to how to isolate my music storage drive although it has occurred to me that it may be that there are no truly isolated USB Buses to choose from on my Mini, but since all of the Hubs appear to be managed under the single USB3 Bus as listed.
If this is not so I would really appreciate some help with sorting out the different USB3 and USB2 Hubs on the singular USB3 Bus shown in my Mac Mini's System Report...
I don't have the newer Mini so I can't experiment but those ports are dynamically assigned depending on what's connected. You may need to experiment with swapping different devices on different physical ports. Then view the System Report. A reboot between swaps -may- also help but I'm not sure. Haven't tried it in a long time.
Another way to help improve your chances is to minimize the number of connected USB devices. No USB mouse, keyboard, IR receiver, etc. Some of these devices can be disabled in software. Make sure your USB drive is USB 3.0 or it will always connect as a USB 2 device. If all else fails perhaps try a Thunderbolt disk for music storage.
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