If your DVD Drive is no longer under warranty, you can replace the internal DVD drive with a newer model that supports the newer media and read/write speeds.
You can also do a Internet search for Richoh RW1525A firmware. This will only allow you to use the higher media but not write at those speeds.
NOTE: TRITTON does not support updating the drives firmware. Doing so may result in the drive becoming damaged and unusable. Update the firmware at your own risk.