On Tue, 14 May 1996, VaX#n8 wrote:

> I assume it has to do with the stackable vfs/vnode/whatever thing.
> Does anyone have any references where I can read about how the filesystem
> works now?
> 
The new daemon book has just begun to hit the shelves.  I think it 
addresses this specifically.  Also, there is another internals book by a 
guy by the name of Uresh Vahalia (or something very close) called "Unix,
The New Frontier" that discusses the 4.4 BSD filesystem implementation.

As an aside, I quickly perused the new daemon book at my local bookseller 
and it specifically mentions both NetBSD and FreeBSD in the context of 
carrying the BSD flame.