NFS write problem

[cjl@ai.mit.edu (Chris Lindblad)]

    Date: Sat, 17 Feb 90 13:34:26 EST
    From: bouma@cs.purdue.edu

       I have mounted a lisp machine file system under unix. There is no problem
    reading files or doing cd or ls. But when I try writing all I get is an empty
    file. The unix machine logs an "NFS write error 5". Any clues as to what is
    going on or advice on debugging this are appreciated.

If you set the documented variable nfs:*debug-on-nfs-error* to t the Symbolics
NFS Server will enter the debugger before returning any error to the UNIX, so
you will get a better idea of what the error is.

       Since genera has different file protection scheme than unix, all files list
    as having rw-rw-rw- protection from the unix side. The empty file entry lists 
    rw-------. Where is this info stored in the lisp file? Perhaps this protection
    mixup is causing it to deny writing the file?

A quick look at the UNIX error codes shows that this error code is "IO error",
which is used by Symbolics NFS to cover all error conditions not already
covered by some more specific UNIX error code.  Since you didn't get the error
code for "Permission denied" then it isn't a permission error.