mounting WORM filesystems

[A. Lester Buck]

Thanks to all those who responded to my recent questions about
the File System Switch.  Today a related question arose
about Unix filesystems on WORM drives.  As I understand it,
the FSS abstracts the logical structure of various types of file
systems on basically the same physical type device
(read/write magnetic disk).  At first glance, it seems that
a WORM drive would have no problem with matching the logical
structure of a normal System V filesystem, but accessing it
in the same physical pattern would be a performance disaster.
It also seems like this should be a well studied problem.

Could someone refer me to appropriate Usenix papers, or more
general discussions of WORM filesystems?

What commercial products (if any) allow mounting a Unix
filesystem on a WORM drive?

Is it possible to mount a WORM filesystem under Unix
without making any kernel modifications (and have some
type of reasonable result/performance)?  That is, are
we tied to a given vendor's version of Unix, or can we
take our driver with us?

-- 
A. Lester Buck		...!uhnix1!moray!siswat!buck