I think I started the question about NeXT CD's. My experiment
was on NS 3.3 install and developer cdroms. The results on my
sparc running NEtBSD 1.1 ( -current ) was that mount_ffs  reported
misplaced superblocks  on these.

I have some questions about block size here... does mount expect
512 byte blocks or does this depend on the device. It seems possible
that my CD is reading in 2048 byte sectors and this messes up the
mount.

Clarence Wilkerson