That post is 6 years old and ONTAP has been through at least 3 major releases since then. Additionally, the post states that the purpose of ONTAP on Linux was

That post is 6 years old and ONTAP has been through at least 3 major releases since then. Additionally, the post states that the purpose of ONTAP on Linux was to simulate ONTAP for testing & education purposes. In 2006 this was probably the easiest way, but those needs have been met for years by the VMware images NetApp provides. So, this almost certainly does not exist anymore.