New PowerBook 15 won't talk to USB HardDrives

Discussion in 'Macintosh Computers' started by Michael Gyngell, Feb 17, 2005.

  1. macrumors newbie

    Joined:
    Feb 17, 2005
    #1
    Just received my new PowerBook 15/1.67. I've tried several different USB 2 bus powered hard drives without any success. The disks won't spin-up, and don't mount. System Profiler sees the USB interface of the drive but not the drive itself. The same disks worked fine on an iBook! Other USB devices, keyboard & mouse also work.

    Has anyone else seen this behavior or is my PB broken (on arrival).
     
  2. macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
    #2
    Did you try both ports?

    The specs say 500mA for both -- but people have found that in reality only one of the ports may provide full power.
     
  3. thread starter macrumors newbie

    Joined:
    Feb 17, 2005
    #3
    I tried both USB ports. Same behavior
     
  4. macrumors newbie

    Joined:
    Jan 30, 2005
    #4
    Try differnet cables... I thought my firewire bus was shot when my ipod refused to spin up/mount turns out the cable just gave out... still gave power though just no data.
     
  5. thread starter macrumors newbie

    Joined:
    Feb 17, 2005
    #5
    I think that this is a known issue! There's a thread at discussions.info.apple.com. It seems that the USB ports on the PB adhere very closely to the USB spec ... so if a device draws more than 500mA it won't work!!!!!
     
  6. TEG
    macrumors 604

    TEG

    Joined:
    Jan 21, 2002
    Location:
    Langley, Washington
    #6
    Please, break down and either do one or both of the following.

    1) Purchase a Powered (by the wall) USB Hub. Attach Hub to PB, HD to Hub. The HD should now power up.

    2) Purchase a power cable for the USB HD. Every USB powered HD should have the ability to use a power adapter. If not, try option 2.

    3) There is no number 3.

    TEG
     
  7. macrumors 603

    Mechcozmo

    Joined:
    Jul 17, 2004
    #7
    USB doesn't give enough bus power for most hard disks. Get an A/C adaptor (should have come with it) or try a powered hub.
     

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