What should I do if my Iomega® USB Hard Drive is not assigned a drive letter or is not detected in Windows® XP?
Document # 11302.html

Please use the following steps if a drive letter is not automatically assigned to the Iomega® USB Hard Drive or if the drive is not detected in Windows® XP.

    Important: Windows XP provides all of the drivers needed to install your Iomega Hard Drive. Additional drivers are not needed and, therefore, are not available for download from the Iomega Web site. Software titles for use with your drive can be downloaded from the Iomega Web Site at http://www.iomega.com/software/

    Note: All of the steps contained in this document must be done in the order that they are listed.


STEP ONE - Check all connections
  1. Unplug the USB data cable from the drive and the computer.

  2. Check the ends of the USB data cable to ensure that they are not damaged.

  3. Reconnect the USB data cable to the drive and the computer. Check the connections to ensure that they are secure.

  4. Check the power supply connections to the drive and power outlet to ensure that they are secure.

  5. Restart the computer.

  6. Click Start and then double-click the My Computer icon to see if the Iomega Hard Drive is detected.

    If the Iomega Hard Drive is detected, you can now use the drive.

    If the Iomega Hard Drive is not detected, please try another USB cable and/or power supply (if available). If the Iomega Hard Drive is still not detected, continue with the next step.


STEP TWO - Manually assign a drive letter to the Iomega Hard Drive
  1. Click Start, right-click the My Computer icon and select Manage.

  2. Click the plus (+) sign next to Storage if it is not already expanded.

  3. Click Disk Management.

  4. Right-click the icon for the Iomega Hard Drive and click Change Drive Letter and Path.

    Important: Windows may report the Iomega Hard drive as a generic Local Disk and a non-Iomega drive string may be present. For more information, please go to http://www.iomega.com/support/documents/11273.html

  5. Click the Edit button.

  6. Next to Assign a drive letter, select an unused drive letter from the drop-down menu.

  7. Click OK.

  8. A message appears that states 'Changing the drive letter of a volume may cause programs to no longer run. Are you sure you want to change the drive letter?'

  9. Click Yes.

  10. Restart the computer.

  11. Click Start and then double-click the My Computer icon to see if the Iomega Hard Drive is detected.

    If the Iomega Hard Drive letter appears, you can now use the drive.

    If the Iomega Hard Drive is still not detected, continue with the next step.


STEP THREE - Disconnect the Iomega Hard Drive from the USB hub

    Note: If you are not using a USB hub, proceed to STEP FOUR

  1. Disconnect the Iomega Hard Drive from the USB hub.

  2. Try connecting the Iomega Hard Drive directly to one of the USB connectors on the computer.

  3. Restart the computer.

  4. Double-click the My Computer icon to see if the Iomega Hard Drive is detected.

    If the Iomega Hard Drive is detected, you can now use the drive.

    If the Iomega Hard Drive is still not detected, continue with the next step.


STEP FOUR - Check the USB controller

Please use the following steps to see if the USB controller is enabled and working properly.

  1. Click Start, right-click the My Computer icon and select Manage.

  2. Click the Device Manager icon.

  3. Click the plus (+) sign next to Universal Serial Bus Controllers.

    Note: If Universal Serial Bus Controllers is not listed, there is a problem with the USB controller or the USB controller is not enabled in the computer's BIOS. Please contact the computer or card manufacturer for updated drivers and/or for information on how to fix or enable the USB controller.

  4. Under Universal Serial Bus Controllers, a Universal Host Controller and a USB Root Hub should be listed.

    If the Universal Host Controller or USB Root Hub has an exclamation mark next to it or a red X on the icon , there is a problem with the USB Controller. Contact the computer manufacturer or card manufacturer for updated drivers and/or for information on how to fix the USB controller.

    If the Universal Host Controller or USB Root Hub does not have an exclamation mark next to it or a red X on the icon , please continue.

  5. Now ensure that your system has the latest USB chipset drivers installed. Please use the following steps to help determine your computer's USB chipset manufacturer.

    1. Right-click the My Computer icon and select Properties (Windows XP/2000 users should right-click the My Computer icon and select Manage).

    2. Click the Device Manager tab or icon.

    3. Click the plus (+) sign next to Universal Serial Bus Controllers.

      Note: If Universal Serial Bus Controllers is not listed, there is a problem with the USB controller or the USB controller is not enabled in the computer's BIOS. Please contact the computer manufacturer for information on how to fix or enable the USB controller.

    4. Under Universal Serial Bus Controllers, a Universal Host Controller and/or an Enhanced Host Controller should be listed. The name listed for the controller should be the manufacturer of the USB chipset. Please refer to the illustration below.



    As shown in the illustration above, the first one listed is an Adaptec USB chipset (add-in USB 2.0 card) and the second one listed is an Intel USB chipset (built-in USB 1.1 card). Using the information provided on how to find the manufacturer name, please contact the chipset manufacturer for updated drivers. Some common USB manufacturers are:

    1. Adaptec® - http://usb.adaptec.com/
       
    2. Intel® - http://www.intel.com/support/chipsets/inf/index.htm
       
    3. Orange Micro® - http://www.orangemicro.com/softwareupdates.html
       
    4. Via - http://www.viaarena.com/?PageID=2
       
  6. Click Start and then double-click the My Computer icon to see if the Iomega Hard Drive is detected.

    If the Iomega Hard Drive is detected, you can now use the drive.

    If the Iomega Hard Drive is still not detected, continue with the next step.


STEP FIVE - Check for IRQ conflicts and create a separate boot file if necessary

An IRQ is an Interrupt Request. There are 16 of these hardware lines over which devices can send interrupt signals to the microprocessor. Please use the following steps to check for IRQ conflicts.

  1. Click Start, right-click the My Computer icon and select Manage.

  2. Click the plus (+) sign next to System Information.

  3. Click the plus (+) sign next to the Hardware Resources folder.

  4. Click the Conflicts/Sharing folder. All of the cards and/or devices that have an IRQ conflict should be listed here.

  5. If there are additional devices on the same IRQ as the USB controller (such as Modems, Network Cards, Audio devices, Video devices, PCMCIA controllers, etc.) an IRQ conflict is possible. Many times two or more devices can share an IRQ without conflicting. Other times IRQ sharing is not possible, which will result in computer lockups and device malfunctions.

  6. You may contact the computer manufacturer for more information about conflicting IRQs or you can physically remove any conflicting card or device from the computer. If your do not want to remove the conflicting card or device from your computer, please use the following steps to resolve IRQ conflicts by creating a separate boot profile.

    1. Click Start, right-click the My Computer icon and select Properties.

    2. Select the Hardware tab.

    3. Click the Hardware Profile button. Original Configuration should be highlighted.

    4. Click the Copy button.

    5. In the text box, type a new Profile name such as Iomega Hard Drive.

    6. Turn off the computer.

    7. Turn the computer back on.

    8. Windows will now give you the option to select the Boot Profile you would like to use. Choose the profile that you just created above (Iomega Hard Drive).

    9. Click Start, right-click the My Computer icon and select Manage.

    10. Click the Device Manager icon.

    11. You will now need to disable the devices that are sharing the same IRQ by using the following steps.

      1. From the Device Manager, select one of the devices that are sharing the same IRQ as the USB Controller.

      2. Double-click the icon for that device.

      3. At the bottom of the Properties screen, click Disable this hardware profile to place a check mark in the box.

      4. Continue using the steps above to disable all of the devices that are on the same IRQ as the USB controller.

      5. Once you are finished disabling devices, restart the computer.

    12. Restart the computer and boot into the Iomega Hard Drive profile again.

      Note: When you want to use the Iomega Hard Drive, you will need to choose the profile that was created above (Iomega Hard Drive). For all other times, you will need to choose the Original Configuration boot.

    13. Click Start and then double-click the My Computer icon to see if the Iomega Hard Drive is detected.

      If the Iomega Hard Drive is detected, you can now use the drive.

      If the Iomega Hard Drive is still not detected, continue with the next step.


STEP SIX - Check the USB Mass Storage Device properties

Please use the following steps to check the USB Mass Storage Device properties to ensure that the correct driver is loaded.

  1. Click Start, right-click the My Computer icon and select Manage.

  2. Click the Device Manager icon.

  3. Click the plus (+) sign next to Universal Serial Bus Controllers.

  4. Double-click the USB Mass Storage Device icon.

  5. Click the Driver tab.

  6. Click the Driver Details button.

  7. Ensure that the first driver file listed points to the USBSTOR.SYS file.

    If the driver file points to the USBSTOR.SYS file, please click here for additional troubleshooting and support options.

    If the driver file does not point to the USBSTOR.SYS file, continue with the next step.


STEP SEVEN - Uninstall all of the Iomega software installed on the computer

Please use the following steps to uninstall all of the Iomega software installed on the computer.

  1. Ensure that the Iomega Hard Drive is connected to the computer.

  2. Click Start and then click Control Panel.

  3. Double-click the Add/Remove Programs icon.

  4. Select Change or Remove Programs on the left hand side of the Add/Remove Programs window.

  5. Click one of the following files to highlight (both of these files may not be present on your system):

    1. Iomega Backup

    2. Iomega QuikSync™

  6. Click the Change/Remove button.

  7. Follow the instructions as they appear on the screen to uninstall the software.

    Note: If prompted, do not restart the computer at this time.

  8. Continue using steps E through G above to remove all of the files listed. If none of the other files listed are present, please continue.

  9. Leave the Add/Remove Programs window open.

  10. Scroll through the list of installed programs to locate any other Iomega programs installed on the computer. This may include software such as IomegaWare™, Active Disk, etc.

    If no other Iomega programs are installed on the computer, close the Add/Remove Programs application. Restart the computer at this time. Once Windows is finished loading, proceed to STEP EIGHT.

    If other Iomega programs are installed on the computer, please continue.

  11. Click to highlight one of the Iomega software programs installed on the computer.

  12. Click the Change/Remove button.

  13. Follow the instructions as they appear on the screen to uninstall the software.

    Note: If prompted, do not restart the computer at this time.

  14. Continue using steps J through M above to remove all of the Iomega software programs installed on the computer. If no other Iomega software programs are installed on the computer, please continue.

  15. If prompted, click Yes or OK to restart the computer. If not prompted, restart the computer at this time.

  16. Continue with the next step.


STEP EIGHT - Check for conflicts in Device Manager

Please use the following steps to check for any conflicts represented by a question mark and/or exclamation mark in Device Manager.

  1. Click Start, right-click the My Computer icon and select Manage.

  2. Click the Device Manager icon.

  3. Click the plus (+) sign next to Universal Serial Bus Controllers.

  4. If a question mark and/or exclamation mark is present next to one of the controllers listed, right-click the controller and click Uninstall.

  5. Use step D above to uninstall any other USB controllers that have a question mark and/or exclamation mark.

  6. If present, click the plus (+) sign next to Unknown Devices.

  7. If a question mark and/or exclamation mark is present next to a device, determine if the device listed is needed on the system. If the device listed does not have a name or if the name listed is unfamiliar, right-click the icon for the device and click Uninstall.

  8. Use step G above to uninstall any other unknown or unfamiliar devices that have a conflict.

  9. Continue with the next step.


STEP NINE - Ensure that all hidden and system files are visible

Please use the following steps to ensure that all hidden and system files on the computer are visible. These files must be visible for the next step, STEP TEN.

  1. Click Start and click Control Panel.

  2. Double-click the Folder Options icon.

  3. Click the View tab.

  4. Locate Hidden files and folders and then click Show hidden files and folders to enable the option.

  5. Click Hide file extensions for known file types to remove the check mark and disable the option.

  6. Click Hide protected operating system files (Recommended) to remove the check mark and disable the option.

  7. Click Yes to remove the warning message that appears.

  8. Click the Apply button.

  9. Continue with the next step.


STEP TEN - Remove Iomega legacy files from the computer

Please use the following steps to remove Iomega legacy files from the computer.

  1. Click Start, Search and then For Files or Folders.

  2. Under Look in, select the computer's hard drive from the drop-down menu.

  3. In the text box under Search for files or folders named, type in ASC.MPD

  4. Click the Search Now button.

  5. Once the file is found, right-click the file and select Properties.

  6. Click the Version tab.

  7. Look at the information listed in the Other version information section.

  8. If IOMEGA, inc. is listed under Value, then delete the file. If Advanced System Products, Inc. is listed under Value, then do not delete the file.

  9. Return to the Search Results window.

  10. Under Look in, ensure that the computer's hard drive is still selected.

  11. In the text box under Search for files or folders named, type in one of the legacy file names listed below.

    Legacy files

    1. CLIKCARD.MPD

    2. D395.MPD

    3. IOMEGA.VXD

    4. IOMUSB.MPD

    5. PC2X.MPD

    6. PC800.MPD

    7. PPA3.MPD

    8. USB_IOS.PDR

    9. USBZIP.SYS

    10. USBZIP.INF

    11. USBIOS.INF

  12. Click the Search Now button.

  13. Once the file is found, right-click the file and select Delete.

  14. Continue using steps K through M above to delete all of the legacy files listed.

  15. Return to the Search Results window.

  16. In the text box under Look in, type c:\windows

    Note: If a folder other than the default folder was selected when Windows Me was installed, then the location of that folder needs to be entered into the text box next to Look in.

  17. In the text box under Containing text, type USBZIP.SYS

  18. In the text box under Search for files or folders named, erase any information that is present.

  19. Click the Search Now button.

  20. Make a note of each of the files found.

  21. Rename each .INF file found with the .OLD extension. For example, if a file is found named OEM4.INF, rename the file to OEM4.OLD

  22. Continue with the next step.


STEP ELEVEN - Check to see if the USBSTOR.SYS file is now loading
  1. Disconnect the Iomega Hard Drive's USB cable from the computer's USB port.

  2. Shut down the computer.

  3. Restart the computer.

  4. Once Windows is finished loading, reconnect the USB cable to the computer's USB port.

  5. Windows should now auto detect the drive and install the proper drivers.

  6. Click Start, right-click the My Computer icon and select Manage.

  7. Click the Device Manager icon.

  8. Click the plus (+) sign next to Universal Serial Bus Controllers.

  9. Double-click the USB Mass Storage Device icon.

  10. Click the Driver tab.

  11. Click the Driver Details button.

  12. Ensure that the first driver file listed points to the USBSTOR.SYS file.

    If the driver file points to the USBSTOR.SYS file, please proceed to STEP TWELVE

    If the driver file does not point to the USBSTOR.SYS file, please continue.

  13. Click Start, Search and then For Files or Folders.

  14. Under Look in, select the computer's hard drive from the drop-down menu.

  15. In the text box under Search for files or folders named, type USBSTOR.SYS

  16. Click the Search Now button.

  17. Once the file is found, make a note of the directory it is in.

  18. Go back into the Driver Details section under USB Mass Storage Device and point the first driver file listed toward the USBSTOR.SYS file and the directory where it is located.

  19. Click Start and then double-click the My Computer icon to see if the Iomega Hard Drive is detected.

    If the Iomega Hard Drive is detected, the problem is resolved and you can now use the drive.

    If the Iomega Hard Drive is still not detected, continue with the next step.


STEP TWELVE - Reinstall the Iomega software

Please use the following steps to reinstall the Iomega software that came with your drive and/or any other Iomega software that was removed from the computer.

Note: You will be asked to restart the computer after reinstalling the Iomega software. Please close all open applications.

  1. Insert the Iomega Hard Drive software CD into the CD-ROM drive.

  2. If the software welcome window does not open automatically, please use the following steps:

    1. Double-click the My Computer icon.

    2. Double-click the CD-ROM drive letter where the software is located.

      Note: If the Iomega welcome window does not appear and a window for the CD-ROM drive opens instead, you will need to double-click the Start.exe icon.

  3. Follow the screen prompts to reinstall the software.

  4. Restart the computer.

  5. Reinstall any other Iomega software that was removed from the computer.

    Note: If IomegaWare was installed on the computer, Iomega suggests that the latest version of IomegaWare be reinstalled to help prevent problems from recurring. You can download the latest version of IomegaWare from the Iomega Software Downloads site at http://www.iomega.com/software/

  6. Click Start and then double-click the My Computer icon to see if the Iomega Hard Drive is detected.

    If the Iomega Hard Drive drive is detected, the problem is resolved and you can now use the drive.

    If you are using a 40GB or 80GB Desktop (External) USB drive, the USB interface cable connection may be loose or there may be a problem with the interface cable. Please recheck the connection and if the drive is still not detected, please contact Iomega Technical support at http://www.iomega.com/support/contact/index.html

    If you are using any other Desktop (External) or Portable USB drive, please go to New Web Page Iconhttp://www.iomega.com/support/askiomega_options.html for additional troubleshooting options.

10 November 2003