A week ago Dell released a firmware update for this DVD drive:
PLDS DH-16A6S SATA HH DVDRW
Download it from: http://support.dell.com/support/downloads/download.aspx?c=us&cs=19&l=en&s=dhs&releaseid=R211597&SystemID=XPS_630I&servicetag=&os=WV64&osl=en&deviceid=16867&devlib=0&typecnt=0&vercnt=1&catid=-1&impid=-1&formatcnt=1&libid=32&typeid=-1&dateid=-1&formatid=-1&fileid=370400
I have one of these drives in my Vostro 410 and I believe you find them in XPS, Optiplex and Inspiron desktops as well.
- Improve the burn application compatibility of DVD-R DL - Improve the tray interaction - Improve the read capability of Qflix media
I believe the drive is a Lite-On OEM drive with Dell firmware.