BenQ 4012EU User Guide - Page 14

Other Hardware Š Spin-down of CD-ROM drives you're copying data or audio from. Š Slow source devices. Š Source devices that transfer data in bursts. Š Incorrect recorder controller settings. Š Inability of the devices to sync properly. Š Overall system configuration. Š Computer is unable to allow data transfer fast enough. Š 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.") Networks Recording across the network (a network may be too slow to maintain adequate throughput speed). Files to Be Recorded Š Recording many small files. Š Damaged source files (data loss). Š Trying to record files in use by the system or other applications. Other Š Copying from a CD that is scratched, dirty, or damaged. Š 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. ♦ It may be necessary to write audio at slower speeds than those you can achieve for data, since writing CD-DA audio requires streaming more bits per second to the recorder. ♦ Record in lower speed - it takes linger time to empty the buffer when recording at lower speed. ♦ Keep the CDs, the recorder, and your source CD-ROM drive free of dust. ♦ Close all other application programs. ♦ Disable the screen saver and anti-virus programs. ♦ PC power management makes PC slower and thus it may result in buffer underrun. Disable the power management or delay the power saving time. ♦ Keep your CD-R/CD-RW cool. Sometimes the drive fails when they overheat. ♦ Your system must fulfill the minimum configuration of your CD-recording Mastering software. ♦ Do not try to copy empty directories, zero byte files, or files that may be in use by the system at the time of recording. ♦ If your data includes more than 10,000 very small files, create a disc image first, or record at a slower speed. ♦ The temporary directory should always have space free at least twice the size of the largest file you are recording. ♦ Try a different brand of recordable disc. User's Manual E-11