How to write WDM DVD-ROM CLASS driver

Hello,

We have new version DVD-RAM driver. We wanted to write a WDM driver for the
same. The driver has to support READ and WRITE operations.

I have gone through the DDK documentation and I understood how the DVD
driver fits in the WDM architecture. My understanding is here below,


Application

|

DVD file reader

|

UDF File System

|

DVD-ROM Driver

|

DVD-ROM DRIVE

My problem is, I am not able to get more information about DVD-ROM driver
and how it interact with other componets of the WDM modwl.

Can any one give help me to find more information about the DVD-ROM
driver?

Thank you,
Bala