Block Device Drivers, Vnodes, and NFS

[Frank Greco]

Does anyone out there know where (other than the Sun docs) there useful
information regarding block device drivers, vnodes and NFS?  I need
answers to questions like:

o How does a disk become NFS-aware?  
o Which interface (vnode or NFS) does a device-driver-writer use as their
  API?
o What is the difference between the vnode and NFS interfaces?
o Do you really have to worry about these interfaces or do you just write an
  ordinary block device driver and let SunOS take care of the rest?

Thanks all,
Frank D. Greco - Consultant
email: fgreco at shearson.com         | email: frank5 at mars.njit.edu