Solaris mounting Linux NFS shares: nfs mount: mount: /mount_point: Not owner

In a supreme example of why programmers can sometimes write error messages that make prefect sense to them, but are absolute gibberish to everyone else, and don't really help isolate the problem, I present today's bafflement:


bash-3.00# mount -F nfs 192.168.2.248:/c/prc /Backup_PRC/
nfs mount: mount: /Backup_PRC: Not owner
bash-3.00# ls -ld /Backup_PRC/
drwxr-xr-x 2 root root 512 Aug 3 10:10 /Backup_PRC/


Well, yes, I am the owner, thanks for asking. The real cause? Solaris 10 NFS defaults to using NFSv4, and Linux doesn't support it properly (or so the story goes). The solution is real simple: use NFSv3:


bash-3.00# mount -F nfs -o vers=3 192.168.2.248:/c/prc /Backup_PRC/
bash-3.00# mount | grep Back
/Backup_PRC on 192.168.2.248:/c/prc remote/read/write/setuid/devices/vers=3/soft/bg/xattr/dev=4a80006 on Tue Aug 3 10:14:35 2010