Can you get the INF file for this Drive.
You have the firmware but it doesnt recognize the Drive.

Support Information:
Device Type: CD / DVD
Manufacturer: Pacific Digital
Model: SOHW-812S
Interface: SCSI
Operating System: Windows XP Professional
Age of Device: Not specified
FCCID:

Type of drive: dvd-r/cd-rw (dvd burner, dvd reader, & cd burner combo)
Location: internal
What recording software are you using?: Nero/version

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=1231&qa5=3&qa7=1500&dp=3&qm0=SOHW-812S&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Pacific+Digital+CD+%2F+DVD++SOHW-812S+Windows+XP+Professional+) | Research manufacturer Pacific Digital (http://members.driverguide.com/index.php?action=getinfo&companyid=1231)

Optical drives do not require an INF file nor does it require any other driver. Support for optical drives is included with the XP os. Is the drive listed in My Computer or Device Manager? If not that's called non-detection. There's lots of things that can cause non-detection. Read all about them in multiple threads in this forum dealing with the same subject.