Apparently, while
-ro is a valid option in
/etc/exports (for read only),
-rw is not the way to specify read/write access. I guess the only way to specify read/write access is to say nothing
Anyway, with this change on minerva:
/etc/exports
Code:
/home/hanzer/nfs -alldirs -mapall=hanzer:hanzer -network=192.168.0 -mask=255.255.255.0
NFS now works as expected.