Accessing Class Driver

I’ve been trying to write an Upper Class Filter
driver for my disk drive partitions. The problem is I
cannot get the reference to the device objects. For
example how do I attach a filter device object to say
the partition corresponding to “d:”.

Or for that matter how do I attach a device to
partition mounted under “c:\mnt\xxx”. note that i need
the class driver, not a refernce to the filesystem
device object.


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