SCP copy over WiFi heavily decrease USB operations

Discussion in 'Mac OS X Lion (10.7)' started by l..k, Aug 5, 2012.

  1. l..k, Aug 5, 2012
    Last edited: Aug 9, 2012

    macrumors newbie

    Jul 30, 2012

    I have just posted about the problem on but it seems there is very few people knowing the internals of the OSX.

    EDIT: found the root cause of the problem - dying battery in my wireless keyboard. Why it degraded in operation under such condition, with SCP running, and not otherwise is a great mystery but a few days later it started to degrade all the time.

  2. macrumors 65816

    Nov 26, 2007
    Austin, TX
    Is the drive you are copying to/from a USB drive?

    Use system profiler to see how things are hooked up on your USB busses. You might be able to improve things by simply plugging your keyboard/mouse into a different usb port.
  3. thread starter macrumors newbie

    Jul 30, 2012
    No, I copied from my internal drive. What profile tools do you think about? Is there something more advanced than the ActivityMonitor?
  4. macrumors 6502a

    Jul 16, 2012
    St. Louis, MO
    When I first got my MBA I had to transfer ~30GB of files from my Ubuntu Dell laptop. I had no problems whatsoever with system responsiveness using the scp command.

    It would be VERY nice if Finder had SSH/SFTP built-in like Nautilus
  5. macrumors 65816

    Nov 26, 2007
    Austin, TX
    It would be nice, but Cyberduck and Filezilla are both nice editions which give this capability


    Click on the :apple:->about this mac->more info->system report. Then on the left column click on USB. From there you can see the topology of your USB connections.

    I have never had a mini. I have never had a problem with my mbp or imac when using scp.
  6. l..k, Aug 7, 2012
    Last edited: Aug 7, 2012

    thread starter macrumors newbie

    Jul 30, 2012
    Thanks, but the USB topology does not reveal anything interesting. The problem happens with keyboard only attached. Sure, there are other devices on the buss which are internal to the mini, but again how can I tell if they cause problems?

    I am thinking of installing Debian natively, and OSX as virtual machine. The OS X is quite interesting, have neat visual style, good set of applications, but the performance is far behind Linux or MS Windows.

    Sure, I hope the performance could be tuned. Unfortunately there is really very scarce know-how amongst mac users. Mac users seems to love their mac and get things "as is". There is no much difference amongst MS Windows users either but MS seems to care more about their OS and spend much bigger budget to test it thoroughly, document things and sustain. OS X seems close to Linux so I was hoping the same level of community knowledge would be available as for Linux :(

    I found a book
    which seems to explain the system a little.

    Does anyone know any better book/resource?

    "Why do I have to learn internals of all things I bought to make them work as they supposed to in the first place??" :confused:

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