Comments on: New Mac Mini Is A Diamond In The Rough http://blog.fosketts.net/2009/03/10/mac-mini-diamond-rough/ Understanding the accumulation of data Sat, 11 Feb 2012 20:58:00 -0500 hourly 1 http://wordpress.org/?v= By: Mecki http://blog.fosketts.net/2009/03/10/mac-mini-diamond-rough/comment-page-1/#comment-15023 Mecki Mon, 13 Sep 2010 23:05:00 +0000 http://blog.fosketts.net/?p=1501#comment-15023 Sorry, but this article is incorrect regarding the USB buses and always has been incorrect (@skoosht: late or early Mac 2009 plays no role). The Mac Mini has only *TWO* USB buses, no model ever had more than two. Those are labeled @4 and @6. The @4,1 and the @6,1 are just the EHCI (USB 2.0 Highspeed) version of the @4 and @6 buses (which are just OHCI Full-/Low-Speed USB 1.1 buses). That port 2 has an own bus is an urban myth! Never ever did this port have an own bus. The ports are shared as follow: 1,2,5 -> @4 Bus; 3,4 -> @6 bus. Further the IR receiver is on the @4 bus and the Bluetooth chip is on the @6 bus. Please understand that @4 and @4,1 are the *SAME* bus. If you plug an USB 1.1 device into port 1, 2, or 5, it will show as part of the @4 bus. If you plug an USB 2 device into the same ports (1, 2, or 5) it will show as part of the @4,1 bus. Same holds true for @6 and @6,1. Those are not physically different buses, they are only logical buses. Sorry, but this article is incorrect regarding the USB buses and always has been incorrect (@skoosht: late or early Mac 2009 plays no role). The Mac Mini has only *TWO* USB buses, no model ever had more than two. Those are labeled @4 and @6. The @4,1 and the @6,1 are just the EHCI (USB 2.0 Highspeed) version of the @4 and @6 buses (which are just OHCI Full-/Low-Speed USB 1.1 buses). That port 2 has an own bus is an urban myth! Never ever did this port have an own bus. The ports are shared as follow: 1,2,5 -> @4 Bus; 3,4 -> @6 bus. Further the IR receiver is on the @4 bus and the Bluetooth chip is on the @6 bus.

Please understand that @4 and @4,1 are the *SAME* bus. If you plug an USB 1.1 device into port 1, 2, or 5, it will show as part of the @4 bus. If you plug an USB 2 device into the same ports (1, 2, or 5) it will show as part of the @4,1 bus. Same holds true for @6 and @6,1. Those are not physically different buses, they are only logical buses.

]]> By: skoosht http://blog.fosketts.net/2009/03/10/mac-mini-diamond-rough/comment-page-1/#comment-14328 skoosht Wed, 03 Mar 2010 10:06:18 +0000 http://blog.fosketts.net/?p=1501#comment-14328 by the way, this looks like it isn't true anymore with the late 2009 mac mini's. mine is showing a dedicated bus for bluetooth, and another for IR, leaving 3 ports on one bus and 2 ports on another. So only 2 usb busses for 5 ports. can someone else check my findings? by the way, this looks like it isn't true anymore with the late 2009 mac mini's. mine is showing a dedicated bus for bluetooth, and another for IR, leaving 3 ports on one bus and 2 ports on another. So only 2 usb busses for 5 ports. can someone else check my findings?

]]> By: Russ http://blog.fosketts.net/2009/03/10/mac-mini-diamond-rough/comment-page-1/#comment-14020 Russ Sat, 21 Nov 2009 10:53:02 +0000 http://blog.fosketts.net/?p=1501#comment-14020 I'm not using Bluetooth at all and it seems a shame to devote an (unused) USB bus to it. Is it possible to shift the USB port assignments around so we could have 4 high bandwidth ports instead of just the 3 you've shown us? Great article btw, thanks! I'm not using Bluetooth at all and it seems a shame to devote an (unused) USB bus to it. Is it possible to shift the USB port assignments around so we could have 4 high bandwidth ports instead of just the 3 you've shown us? Great article btw, thanks!

]]> By: Russ http://blog.fosketts.net/2009/03/10/mac-mini-diamond-rough/comment-page-1/#comment-13847 Russ Sat, 21 Nov 2009 05:53:02 +0000 http://blog.fosketts.net/?p=1501#comment-13847 I'm not using Bluetooth at all and it seems a shame to devote an (unused) USB bus to it. Is it possible to shift the USB port assignments around so we could have 4 high bandwidth ports instead of just the 3 you've shown us? Great article btw, thanks! I'm not using Bluetooth at all and it seems a shame to devote an (unused) USB bus to it. Is it possible to shift the USB port assignments around so we could have 4 high bandwidth ports instead of just the 3 you've shown us? Great article btw, thanks!

]]> By: dlane http://blog.fosketts.net/2009/03/10/mac-mini-diamond-rough/comment-page-1/#comment-13716 dlane Thu, 24 Sep 2009 07:27:40 +0000 http://blog.fosketts.net/?p=1501#comment-13716 can each bus fully saturate the entire USB 2.0 speeds at the same time? Can the chipset handle it? what's the maximum bus speeds the Ion can handle? can each bus fully saturate the entire USB 2.0 speeds at the same time? Can the chipset handle it? what's the maximum bus speeds the Ion can handle?

]]> By: sfoskett http://blog.fosketts.net/2009/03/10/mac-mini-diamond-rough/comment-page-1/#comment-13700 sfoskett Sat, 19 Sep 2009 18:11:26 +0000 http://blog.fosketts.net/?p=1501#comment-13700 I figured out which port was on which bus by using the System Profiler's list of USB devices and plugging a device into each port. Trial and error! I figured out which port was on which bus by using the System Profiler's list of USB devices and plugging a device into each port. Trial and error!

]]> By: dlane http://blog.fosketts.net/2009/03/10/mac-mini-diamond-rough/comment-page-1/#comment-13685 dlane Fri, 11 Sep 2009 12:05:20 +0000 http://blog.fosketts.net/?p=1501#comment-13685 Thank you so much for the USB bandwidth info!!! Out of curiosity... how did you find that info??? :P thanks! Thank you so much for the USB bandwidth info!!! Out of curiosity… how did you find that info??? :P thanks!

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