Troubleshooting the Iomega® Portable Hard Drive for USB

If you encounter a problem while connecting or using the Iomega Portable Hard Drive, check the topics listed below for possible solutions. For additional help options, see How to Get Help.

NOTE: We recommend checking the Iomega web site (www.iomega.com) frequently for updated software and the latest information on USB.

The Iomega Portable Hard Drive icon Does Not Appear on a Mac® OS Desktop.

  1. If you did not reboot your computer after installing the Iomega software, do so now.

  2. Check all connections.

  3. Make sure the drive is receiving power. The status light on the interface module should be on.

  4. Make sure you are using the USB cable that came with the Iomega Portable Hard Drive.

  5. If you are connected to a USB hub, ensure the hub is connected correctly and has power.

  6. Try connecting the drive directly to one of the USB connections on your computer, rather than a USB hub or keyboard.


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The Iomega Portable Hard Drive Is Not Assigned a Drive Letter under Windows.

  1. Check all connections.

  2. Make sure the drive system is receiving power.

  3. Make sure you are using the USB cable that came with your Iomega Portable Hard Drive.

  4. If you have not already done so, insert the installation CD. The driver will automatically install.

  5. Try reinstalling the software. If you are using Windows and the Iomega software is already installed, remove it using Add/Remove Programs in Control Panel, restart Windows, then reinstall the software.

  6. Check to see if your USB controller is enabled and is working properly:

  7. Windows® 98/Me Users:

    1. Right click on the icon for My Computer and select Properties.

    2. Click the tab for Device Manager.

    3. Double click on Universal Serial Bus Controller.

    4. Universal Host Controller and USB Root Hub should be listed.

    5. If either of these has an exclamation or a red X next to it, or if the Universal Serial Bus Controller is not listed, there is a problem with the USB Controller. Call your computer manufacturer for information on getting it fixed.

  8. If you are connected to a USB hub, ensure the hub is connected correctly and has power.

  9. Try connecting the Iomega Portable Hard Drive directly to one of the USB connections on your computer, rather than a USB hub or keyboard.

  10. Try manually assigning a drive letter to the Iomega Portable Hard Drive.

  11. Check your BIOS to ensure USB is enabled. Refer to your computer's User's Guide or manual for directions.

NOTE: If you disconnect the Iomega Portable Hard Drive and reconnect to the same USB port, the drive should be reassigned the same drive letter automatically. If you reconnect to a different USB port, you may have to manually reassign the drive letter.

If the problem continues, there may be a driver conflict on your system. Please contact the Iomega web site (www.iomega.com) for additional troubleshooting information.



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Windows® 2000 Users:

  1. Check all connections.

  2. Make sure the Iomega Portable Hard Drive is receiving power.

  3. Make sure you are using the Iomega USB cable that came with the Iomega Portable Hard Drive.

  4. If you are connected to a USB hub, ensure the hub is connected properly and has power.

  5. Try connecting the Iomega Portable Hard Drive directly to one of the USB connections on your computer, rather than a USB hub or keyboard.

  6. Try manually assigning a drive letter to the Iomega Portable Hard Drive.

  7. NOTE: You must have administrator privileges for your local computer in order to change drive letters under Windows 2000.

    1. Select Control Panel, Administrator Tools, Computer Management, then Disk Management.

    2. Right click on the icon for the Iomega USB drive and select Change Drive Letter and Path from the shortcut menu.

    3. Click the Edit button.

    4. Click on Assign a drive letter and select the letter you want to use for your Iomega Portable Hard Drive.


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Iomega Portable Hard Drive Performance Seems Slow.

  • Other USB devices connected at the same time as the Iomega Portable Hard Drive can affect performance, especially digital cameras or scanners that are processing large amounts of data.

  • If you are using a hub to connect several devices to your computer, disconnect the other devices and connect the device directly to either of the computer's USB ports.

  • NOTE:The Iomega Portable Hard Drive with a USB interface module is capable of running at speeds up to 40 times faster than the standard USB 1.1 technology. Connect the Iomega Portable drive to a USB 2.0 port to achieve the USB 2.0 speed. Connected to a standard USB 1.1 port, the drive runs at the standard USB 1.1 speed.

  • If you are using a hub, make sure it is USB 2.0 compliant.

  • For additional informatation see the Formatting section in Using the Drive.


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The Iomega Portable Hard Drive Stops Responding (Locks up), or Information Gets Lost or Corrupted While Saving or Copying Files.

The problem is probably due to a non-compliant USB controller chip or other USB device on your computer system. Try the following suggestions:

  • Carefully follow the USB guidelines. They are designed to help you avoid some of the problems caused by non-compliant USB devices.

  • If the problem still continues, you may want to upgrade the USB controller in your computer system to one that complies with the latest USB specification. In this case, contact your computer manufacturer for help.

  • Do not connect or disconnect any USB device while the Iomega Portable Hard Drive is transferring information. Data loss will result!

CAUTION! USB devices (including controller chips, hubs, cables, cards, mice, joysticks, and peripherals) that do not comply with the USB specification may cause system lockups or possible data loss when used with the Iomega Portable Hard Drive. If you are not sure that a USB device complies with the latest USB specification, contact the manufacturer of the device.


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The Iomega Portable Hard Drive Does Not Work on an Older Laptop Computer.

Some older laptops use a USB port called an "Open Host" that is not compliant with the latest USB specification. If your laptop has an "Open Host" USB port, the Iomega Portable Hard Drive may not be assigned a drive letter when connected to the laptop. Try following the USB guidelines. They are designed to help you avoid some of the problems caused by non-compliant USB devices. If you continue to have problems, contact the manufacturer of your laptop computer for additional information.


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Iomega Corporation
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