USB 3.0 issues

Discussion in 'MacBook Pro' started by Tech198, Jul 29, 2012.

  1. Tech198 macrumors G4

    Joined:
    Mar 21, 2011
    Location:
    Australia, Perth
    #1
    After doing a DIY install creation of Mountain Lion from Disk Utility on a USB stick, I rebooted... While rebooting i pulled flash drive out.....

    However, the USB is not dead, as i can read it fine from OS X.. it just doesn't show up in the Mult-boot screen at boot...

    Trying to see why its not showing up,,,weather it was pulling it out without Ejecting it first.. or the fact i didn't create bootable flash drive....

    But what makes me think its a flash drive issue, is when i plug in the usb flash after seeing my drive on the multi-boot screen, the macbook halts...

    That is,, the pointer freezes and unable to move, until i unplug, or power off.


    Also, if i leave the flash connected while power on, i do not see the Apple logo,, ever..... just a grey screen... even if i wait a long time.

    This all leads me to the unplugging as it all started go go 'iffy' afterwards.

    Recommendations?
     
  2. Tech198 thread starter macrumors G4

    Joined:
    Mar 21, 2011
    Location:
    Australia, Perth
    #2
    ...

    UPDATE:

    I tried this with a fresh USB stick and the the flash drive appeared after holding down Option at boot.

    However, it wasn't booting.. I saw the apple logo after selection, then i saw "what looks like" a "no smoking symbol" with the continuous circle at bottom centre...

    What does this mean? it s a new usb flash drive. This happens in both USB ports.

    yet once booted into the OS, from HD, I can read/write files fine to usb.
     
  3. T5BRICK macrumors 604

    T5BRICK

    Joined:
    Aug 3, 2006
    Location:
    Oregon
    #3
    It sounds like the custom install of ML wasn't created correctly. I'm sure there is nothing wrong with your computer or USB drive. The "no smoking symbol" indicates that it can't boot from the drive you've pointed it at.
     
  4. BigZ9 macrumors member

    Joined:
    Apr 2, 2012
    #4
    Did you format the drive as a GUID partition table and make it Mac OS X Extended (Journaled)? It seems like that could be the issue.
     
  5. terraphantm macrumors 68040

    Joined:
    Jun 27, 2009
    Location:
    Pennsylvania
    #5
    The USB3 support is extremely flaky at the moment. Mine is only recognized approximately once in every 10 plug ins. So when you're trying to boot off it, it probably loses the connection once the XHCI kext kicks in.
     
  6. Tech198 thread starter macrumors G4

    Joined:
    Mar 21, 2011
    Location:
    Australia, Perth
    #6
    Solved.

    Your right.... I was creating it wrong...
     
  7. T5BRICK macrumors 604

    T5BRICK

    Joined:
    Aug 3, 2006
    Location:
    Oregon
    #7
    It sounds like something is wrong with your USB port or the device you're trying to connect.

    Good to hear!
     
  8. billpaxton macrumors member

    billpaxton

    Joined:
    Feb 12, 2008
    #8
    strangely enough my USB3.0 external hdd was plugged in yesterday and while copying to it, i got the disconnected message in osx. not once but twice.

    then it dissapeared and i left it plugged in, when i actually unplugged it, i got the same device removal message.

    pretty unhappy since its a brand new rMBP...
     
  9. terraphantm macrumors 68040

    Joined:
    Jun 27, 2009
    Location:
    Pennsylvania
    #9
    Google it. Pretty much all the Ivy Bridge macs have major trouble with USB 3.0 drives. It's not the drive.

    Could very well be the USB ports. But in that case, Apple really messed up...
     
  10. iMacFarlane macrumors 65816

    iMacFarlane

    Joined:
    Apr 5, 2012
    Location:
    Adrift in a sea of possibilities
    #10
    I can attest to that. I have a 2012 13" MBP. When I plug my Toshiba Canvio 1TB external into it with the supplied USB 3.0 cable, it does nothing, never mounts. If I plug the drive into the computer using a USB 2.0 to USB micro connector, which fits into a portion of the device's proprietary connector, the drive spins right up and mounts within 1 second. At USB 2.0 speeds.

    Most of the chatter about this drive is that it takes too much current and Apple has safeguards in their ports which disable them if limits are exceeded.

    So, why would the thing draw more current in USB 3.0 mode over USB 2.0 mode? Really? Hardware problem, Apple's side. Curious to see if this ever gets resolved.
     
  11. gentlefury macrumors 68030

    Joined:
    Jul 21, 2011
    Location:
    Los Angeles, CA
    #11
    Thankfully, I can confirm it is a software problem. I have an ssd in a USB 3 enclose. It won't read or write on Mac. I was able to format it once in disk utility then it stopped working again. It just won't do anything.

    However. On the same machine I logged into windows 7 and it reads/writes at about 170MB/s and never drops. It is a Mac problem that will hopefully be resolved soon.
     
  12. terraphantm macrumors 68040

    Joined:
    Jun 27, 2009
    Location:
    Pennsylvania
    #12
    Hmm, i can't get mine to be recognized in Windows either... though that may be a Windows 8 driver issue.
     
  13. gentlefury macrumors 68030

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    Jul 21, 2011
    Location:
    Los Angeles, CA
    #13
    Im using Win7 64...so maybe.
     
  14. terraphantm macrumors 68040

    Joined:
    Jun 27, 2009
    Location:
    Pennsylvania
    #14
    Or actually - now that I think of it, I installed Windows 8 in EFI mode (no BIOS emulation like Bootcamp normally requires). So I guess there might be an EFI issue somewhere. I'm hoping an SMC update will fix the issues.
     
  15. asicguy macrumors newbie

    Joined:
    Jul 14, 2012
    #15
    It doesn't necessarily mean it's a software issue. It might be a bus power issue on Apple's end, which is what I am suspecting.
     

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