Just recently purchased a Dell 9100 + 2405fpw.
The 9100 had a weird dvd±rw drive. It read HL-DT-ST DVD±RW GWA4164B. After searching the forums here the only thing I can come up with is this drive is an LG drive. But there are no support/guides/drivers for this drive.
So I gave up and went to the Dell forum. Here is my thread: http://forums.us.dell.com/supportforums/board/message?board.id=dim_cdrom&message.id=109223
Basically they said this drive is a hybrid between an LG and Hitachi and that there are no guides or support for this drive. What a bunch of crock.
I wanted to get the booktype changed to dvd-rom and none of the utilities from this site worked.
So I burned my first +R media and I couldn’t believe my eyes. The booktype was automatically set to DVD-ROM. Awesome! I was relieved. I had a bunch of +R medias and I wanted to burn them all as ROM.
Hopefully this will help anyone trying to research on this hybrid drive from dell.