ONTAP Recipes: Did you know you can…?
Easily make a file a WORM_APPEND file on a SnapLock volume via NFS
On the NFS host on which the volume is mounted, create an empty file, change the permissions on the file to read only. This makes the file a WORM file. Now, change the permissions back to read-write. This will make the file a WORM_APPEND file.
touch <file>
chmod -w <file>
chmod +w <file> (setting the write permission to ‘group’ or ‘other’ will also work)
For more information, please see the ONTAP9 documentation center