Note, my shell log shows the behavior with mount -o uid=500,gid=500,umask=000. The same behavior (chmod has no effect) occurs when using mount -o permissions,uid=500,gid=500,umask=000 (as if -o permissions is being silently ignored).
Note, my shell log shows the behavior with mount -o uid=500, gid=500, umask=000. The same behavior (chmod has no effect) occurs when using mount -o permissions, uid=500, gid=500, umask=000 (as if -o permissions is being silently ignored).