Mac will not mount external USB drive but keyboard/mouse OK

Discussion in 'Mac Pro' started by funkytwig, Mar 13, 2011.

  1. funkytwig macrumors member

    Joined:
    Jan 14, 2011
    #1
    Hi everybody,

    My Mac Pro will no longer recognise or mount USB drives but the USB keyboard/mouse work fine. I have tried several different drives. I have tried Mac formatted drives and Windows NTFS drives. I have looked in the /Volumes directory to se if they are shown there. Nothing works.

    I have even booted into windows and can mount drives there either. I think it may be a hardware fault.

    It is a Late 2008 Intel Model which has been upgraded to 3Ghz CPUs.

    Any ideas?

    Regards,
    Ben
     
  2. philipma1957 macrumors 603

    philipma1957

    Joined:
    Apr 13, 2010
    Location:
    Howell, New Jersey
    #2
  3. funkytwig thread starter macrumors member

    Joined:
    Jan 14, 2011
    #3
    Philip,

    I have several of both. None work.

    Ben
     
  4. philipma1957, Mar 13, 2011
    Last edited: Mar 13, 2011

    philipma1957 macrumors 603

    philipma1957

    Joined:
    Apr 13, 2010
    Location:
    Howell, New Jersey
    #4
    That is a bad sign. Is your cpu upgrade new and problem came right after or did the upgrade work for weeks /months and problem then came?

    I don't know if you have pci or pcie slots in the 08.

    http://www.newegg.com/Product/Produ...2&cm_re=belkin_usb_pci-_-15-108-012-_-Product

    My 2010 had a 2 or 3 month problem. the built in usb jacks did not work with a lot of items. i purchased the above belkin and it has always worked. It bypasses the built-in usb. Now 3 or 4 months after I have used it most of my built in usb problems have stopped. So my built in problems had something to do with osx software. I am using version 10.6.6. i still have one problem with built-in hubs front and back they will not work with any usb active extensions.

    like this;

    http://www.newegg.com/Product/Produ...active_extension_cable-_-12-816-021-_-Product

    my best guess is try the belkin to by-pass the problem.
     
  5. CaptainChunk macrumors 68020

    CaptainChunk

    Joined:
    Apr 16, 2008
    Location:
    Phoenix, AZ
    #5
    Also, try doing a reset on the PRAM and SMC. Hopefully this isn't a problem with the logic board.
     
  6. handheldgames macrumors 6502a

    handheldgames

    Joined:
    Apr 4, 2009
  7. funkytwig thread starter macrumors member

    Joined:
    Jan 14, 2011
    #7
    How dangerous is resetting SMC, what will it do?
     
  8. funkytwig thread starter macrumors member

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    Jan 14, 2011
    #8
    Yes
     
  9. philipma1957 macrumors 603

    philipma1957

    Joined:
    Apr 13, 2010
    Location:
    Howell, New Jersey
    #9
    back to my other question you had better cpus put in. did everything work for months and month or did the usb problem happen right after the new cpus?
     
  10. funkytwig thread starter macrumors member

    Joined:
    Jan 14, 2011
    #10
    I thought Mac Pro were all PCI-E and PCI is not backward compatible. The item you recomend is PCI.

    Ben
     
  11. funkytwig thread starter macrumors member

    Joined:
    Jan 14, 2011
    #11
    I purchased the Mac used , the CPU upgrade had already been done. Everything has been working fine for a month or two.
     
  12. funkytwig thread starter macrumors member

    Joined:
    Jan 14, 2011
    #12
    Thanks everybody, I got a PCIe USB 2 card and all works great.
     

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