Need help in finding what DVD burner is in this computer

A friend of mine gets HP’s and Compaq’s about 1/2 off there price where he works and he is deciding between Compaq Presario SR1250NX and a HP A620N.

He will be giving me the DVD Burner from either of these machines. I have googled all morning and even emailed HP as to what brand burner is in these systems and have not gotten a reply yet.

It seems the Compaq’s is a dual layer drive.

Anyone know what drives would be in these systems?

thanks

Unless the systems are directly assembled by HP and then sent to the markets for being sold “as-is”, they are customized and you cannot know what drives are installed unless you ask the dealer.