Access to File System Denied to Certain Users

Symptom: A user is unable to access a file or directory even though the user is a member of a group that has been given access to the file or directory.

Cause: The user is a member of more than 16 groups and the group with access to the file or directory is not within the first 16 groups. NFS protocol is used to access File Storage. NFS clients use the AUTH_SYS authentication scheme, which has a limitation of 16 groups.

On Linux, you can run the id command to verify if the user is member of more than 16 groups.

Workaround: This issue is because of an AUTH_SYS hard limit and can only be overcome by reducing the user's group membership to 16 or fewer.