Iomega CD-RW USB 2.0 Drive User Manual page 17

If Enabling DMA Does Not Fix the buffer underrun problem, open the HotBurn software, click Settings. Change the burn speed to a lower setting.
Possible Causes of Buffer Underrun Errors
Causes of buffer underrun errors include:
Poor Media Quality
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USB Problems
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Network Problems
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File Problems
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Hard Disk Problems
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Poor Media Quality
Use brand name CD-R and CD-RW discs. Using top brand name discs helps to ensure the optimal performance of your Iomega CD-RW drive. Check the Iomega website for a list
of recommended media brands. Verify the media is not scratched, dirty, or damaged.
USB Problems
If you are using a USB 2.0 card, verify that you have the latest USB 2.0 drivers. Contact the USB card manufacturer for updates.
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If you are using built-in USB controllers, verify that you have the latest drivers. Contact the manufacturer of your motherboard for updates.
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The Iomega CD-RW USB drive is designed to the latest USB specification. However, some USB devices (including controller chips and hubs) currently available on the
NOTE!
market do not conform to the USB standard. If you experience problems after connecting the Iomega CD-RW USB drive, your system might contain an old driver or a non-compliant
USB controller. Contact the manufacturer of the USB controller or your computer for possible solutions. We also recommend checking the Iomega web site (www.iomega.com)
frequently for updated software and the latest information on USB.
Network Problems
Recording across the network (a network may be too slow to maintain adequate throughput speed)
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File Problems
Recording many small files
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Damaged source files (data loss)
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Trying to record files in use by the system or other applications
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Hard Disk Problems