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Forum FAQ: External USB drive error "You must initialize the disk before Logical Disk Manager can access it"

    General discussion

  • Forum FAQ: External USB drive error "You must initialize the disk before Logical Disk Manager can access it"

     

    Symptom

     

    In some cases, when you connect a USB external hard drive to Windows 7, Windows Explorer does not display it under "My Computer". In Disk Management, you may see the following prompt:

     

    "You must initialize the disk before Logical Disk Manager can access it."

    Cause

     

     The USB device driver may not be installed properly.

     

    Solution

     

    To resolve the issue, reinstall the USB device driver, follow these steps:

     

    1.    Plug in and turn on the external USB hard drive

    2.    Click the Start button, type Device Manager  in the Start Search box and press Enter.

    3.    Expand the Universal Serial Bus controllers.

    4.    Find out the USB hard drive, right click on it and choose Uninstall.

    5.    Unplug and plug the device again.

     

    If the issue persists after performing the steps above, go through the following suggestions on how to troubleshoot USB device issues on Windows 7:

     

    Suggestion 1: Connect the USB device directly to the USB port.

     

    Try connecting the device directly to the USB port without connecting to USB hub to test the issue.

     

    Suggestion 2: Update driver manually

     

    a.    Click the Start button, type Device Manager  in the Start Search box and press Enter.

    b.    Expand Universal Serial Bus controllers.

    c.    Find out the USB drive, right click on it and click Update Driver Software

    d.    Select the Browse my computer for driver software.

    e.    Check the Include subfolder box, and click Browse…

    f.     Browse to the C:\windows folder and click OK.

    g.    Click Next.

     

    Suggestion 3: Delete the USB filter drivers

     

    a.    Click the Start Button, type regedit in the Start Search box and then press Enter.

    b.    Navigate to the following key:

     

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{36FC9E60-C465-11CF-8056-444553540000}

     

    c.    Right click the {36FC9E60-C465-11CF-8056-444553540000} entry, choose Export, select Desktop in the Save in box and type backup in File Name. Click Save.

     

    Please Note: The backup file is on the Desktop and named backup.reg. We can simply restore the registry by double-clicking the backup.reg file.

     

    d.    Highlight this key {36FC9E60-C465-11CF-8056-444553540000} on the right pane, and then check if Upperfilters and Lowerfilters value are present. If so, right click on the values and select Delete to remove them.

    e.    Restart the computer.

     

    Suggestion 4: Reinstall the USB controllers

     

         I.        Use the Mouse

     

    Disconnect all the USB devices and perform the following steps:

     

    a.    Click the Start button, type devmgmt.msc in the Start Search box and press Enter.

    b.    In Device Manager, double click to expand Universal Serial Bus controllers, right click on the Host Controller, click Uninstall and click OK.

    c.    Repeat step b to uninstall all the items under Universal Serial Bus controllers.

    d.    Restart your computer and Windows 7 will reinstall all the USB controllers automatically.

     

       II.        Use the Keyboard

     

    Disconnect all the USB devices and perform the following steps:

     

    a.    Press "Ctrl + Esc" to open the Start menu.

    b.    Type devmgmt.msc in the Search bar and press Enter.

    c.    In Device Manger, press Tab and use "Up" and "Down" to move the highlight to Universal Serial Bus Controllers.

    d.    Press "Right" and expand it.

    e.    Press "Down" to move to the first item and press "Delete" to remove it.

    f.     Repeat the step e and uninstall all items under Universal Serial Bus Controllers.

     

    Suggestion 5: Update the BIOS and Chipset drivers

     

    Suggestion 6: Go to the manufactuer’s website and check if there is any USB device driver update available

     

    Suggestion 7: Backup files in the USB device to another location then format it to NTFS

     

    Applies to

     

    ·         Windows 7

    Friday, June 25, 2010 9:28 AM