Based on your entry it appears that you have the 25DPR47RS4 model. Please note this for future reference.
Model: 25DPR47RS4 - This model can be found on the Disc Media Support
NOTE: You may need to refer to your product again to determine the actual model name.
TIP: Model Numbers are usually located on a sticker located on the back or bottom of the unit. They may also be listed on the product manual.
For VAIO® computers, click here for additional information on locating the model name.