External USB CD-RW
User’s Guide
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Q: What are possible causes of buffer underrun
Hard Disk
• Extremely fragmented hard drive.
• Not enough space in temporary directory.
• Hard disk compression may cause buffer underruns. We do not
recommend writing from a compressed hard disk or disk partition.
• "Dumb" thermal re-calibration (only on very old hard drives).
Other Hardware
• Spin-down of CD-ROM drives you're copying data or audio from.
• Slow source devices.
• Source devices that transfer data in bursts.
• Incorrect recorder controller settings.
• Inability of the devices to sync properly.
• Overall system configuration.
• Computer is unable to allow data transfer fast enough.
• Setting hard drive’s read ahead optimization to "none" may cure
buffer underruns in some cases. (Go to the Start menu | Settings |
Control Panel | System | Performance | Advanced Settings/File
System | Hard Disk and set "Read-ahead optimization" to "None.")
Recording Across The Network
• A network may be too slow to maintain adequate throughput
speed.
Files to Be Recorded
• Recording many small files.
• Damaged source files (data loss).
• Trying to record files in use by the system or other applications.
Other
• Copying from a CD that is scratched, dirty, or damaged.
• Recorder malfunction
Q: What can I do to prevent Buffer underrun?
You can try the following procedures to prevent buffer underrun:
• Use a faster hard drive and defragment your hard drive at least
once a week.
• Do not record across a network. Copy the desired files to your local
hard drive.
• If your source hard disk is more than five years old, make sure it
does smart thermal re-calibration.
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