The problem you are reporting is most likely caused by DVD media incompatibility between your DVD Burner and the particular DVD media you are using. If you are experiencing difficulty with your DVD media it is prudent to insure that your DVD Burner has the most current up to date firmware available for your DVD Burner installed.
To determine the current firmware of your DVD burner use a software utility similar to DVDInfo Pro (http://www.dvdinfopro.com/).
Suggest visiting the CD Freaks Lite-On/Sony DVD Forum (http://club.cdfreaks.com/forumdisplay.php?f=44) for information on obtaining the latest firmware available for your Sony DRU-800A 16x DVD Burner. The folks at the CD Freaks Lite-On/Sony DVD Forum are very knowledgeable and have developed various firmwares that optimize the full potential of your DVD burner. Note- Sony DVD-ROMs and DVD Burners are manufacture by Lite-On.
If after installing the most current up to date firmware available for your DVD Burner your problem still exists you need to pursue obtaining known good reliable DVD media.
Saying you are using Verbatim Digital Movie DVD-R 4x Media does not describe the actual DVD Media you are using. Most DVD media retailers do not manufacture their own DVD media; they just purchase the media from a DVD media manufacture and then put it in boxes with their name on the box. To accurately describe your DVD media you need to provide the Manufacture ID and Media Code (Example- RitekG05). You can obtain the Manufacture ID and Media Code by using DVDInfo Pro (http://www.dvdinfopro.com) or similar software utility.
A little help in deciding which DVD media to use.
Suggest visiting the CD Freaks DVD Recorder Forum (http://club.cdfreaks.com/forumdisplay.php?f=61) for your particular DVD Burner and see which DVD Media other Forum members have reported that work for them.
Suggest visiting the CD Freaks Media Forum (http://club.cdfreaks.com/forumdisplay.php?f=33) and see which DVD Media other Forum members have reported as good reliable DVD media.
Suggest visiting the Video Help DVD Media List (http://www.videohelp.com/dvdmedia) and see what other users have reported about particular DVD Media.
Concerning the quality of DVD media. The saying â€œYou Only Get What You Pay Forâ€ fully applies to DVD media. If the price is cheap the quality is also probably cheap. Remember most dropouts, freezing, skipping and other related problems can be traced to cheap, inferior, substandard DVD media.
Some problems caused by poor DVD media can be overcome by taking a couple actions. Slow down your burning speed. Limit all background activity while Burning DVDs including Ant-Virus programs. Defragment your Hard Drive (Start/Programs/Accessories/System Tools/Disk Defragmenter). Check for Spyware by running Spybot-Search & Destroy (http://www.spybot.info/en/index.html)