USB External Hard Drive keeps disconnecting.

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  1. Posts : 20
    windows 7
       #1

    USB External Hard Drive keeps disconnecting.


    Hey,

    Windows 7 x86

    I've got an USB External Hard Disk Drive (Samsung S2 Portable 500 Gb). In the last 3-4 days it keeps randomly disconnecting when in use... So, Windows starts, it runs fine for an hour or so (in use), then the magic sound strikes. After a couple of seconds it's detected again, and the whole show starts again. Sometimes it reconnects for 3-4 times in a minute. It's driving me crazy!

    My USB drivers are up to date, I've unchecked all those Power Management things, I've installed the KB976972 update (tho I'm not quite sure I was suited for it :) ). I thought it was the cable's fault, so I left it on my brother's Vista PC for about 5 hours playing movies, and it worked...


    LE: Now I'm thinking it could be one of the updates 7 made on the 10th of this month...

    LE2: It was working fine since Christmas.
      My Computer


  2. Posts : 1,309
    Windows 7 Ultimate 32 bit
       #2

    is it the only USB device that's giving you issues? is it connected to a USB hub or direct connected to PC also some system specs would be helpfull
      My Computer


  3. Posts : 20
    windows 7
    Thread Starter
       #3

    It's the only USB that's giving me problems. I've tried switching ports, same thing. Yes, directly connected.

    Windows: Microsoft Windows 7 6.1.7600
    Internet Explorer: 8.0.7600.16385
    Memory (RAM): 3072 MB
    CPU Info: Intel(R) Core(TM)2 Duo CPU E4600 @ 2.40GHz
    CPU Speed: 2398.1 MHz
    Sound card: Speakers (High Definition Audio
    Display Adapters: NVIDIA GeForce 8500 GT | NVIDIA GeForce 8500 GT | RDPDD Chained DD | RDP Encoder Mirror Driver | RDP Reflector Display Driver
    Monitors: 1
    Screen Resolution: 1920 X 1080 - 32 bit
    Network: Network Present
    Network Adapters: Atheros L2 Fast Ethernet 10/100Base-T Controller
    CD / DVD Drives: E: HL-DT-STDVD-RAM GSA-H55N
    COM Ports: NOT Present
    LPT Ports: LPT1
    Mouse: 3 Button Wheel Mouse Present
    Hard Disks: C: 23.8GB | D: 125.3GB | F: 465.8GB
    Hard Disks - Free: C: 8.7GB | D: 18.4GB | F: 62.0GB
    USB Controllers: 5 host controllers.
    Firewire (1394): Not Detected
    PCMCIA (Laptops): Not Installed
    Manufacturer: American Megatrends Inc.
    Product Make: System Product Name
    AC Power Status: OnLine
    BIOS Info:
    Time Zone: GTB Standard Time
    Battery: No Battery
    Motherboard: ASUSTeK Computer INC. P5LD2-X/1333
    Modem: Not detected
    :
      My Computer


  4. Posts : 1,309
    Windows 7 Ultimate 32 bit
       #4

    how many USB devices do you have plugged in to this machine?
      My Computer


  5. Posts : 20
    windows 7
    Thread Starter
       #5

    Keyboard, Mouse and the External HDD.
      My Computer


  6. Posts : 1,309
    Windows 7 Ultimate 32 bit
       #6

    go back to device manager and look at the USB Root Hub properties look at the total power available per port like mine is 500 mA per port it will also tell you what the devices plugged in require make sure that the external USB drive does not require more that what is available per port like if I plugged in a device that required 750 mA into ports that can only deliver 500 mA you would have to use a seperate Powered USB hub to power such a device
      My Computer


  7. zap
    Posts : 32
    Windows 7
       #7

    You might be exceeding the current carrying capability of the USB port. Try hooking a powered USB hub to the port and then plugging the external hard drive to the powered USB hub.
      My Computer


  8. Posts : 20
    windows 7
    Thread Starter
       #8

    I've got 500 mA available per port. 5 ports.

    Keyboard - 100 mA
    Mouse - 100 mA
    HDD - 2 mA
      My Computer


  9. Posts : 1,309
    Windows 7 Ultimate 32 bit
       #9

    HDD only 2 mA are you sure about that
      My Computer


  10. Posts : 20
    windows 7
    Thread Starter
       #10

    Yep! USB Mass Storage Device - 2 mA.
      My Computer


 
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