The following are the top known issues, workarounds, and best practices for ESX/ESXi NFS clients when used with NetApp FAS controllers running Data ONTAP 7-Mode or clustered Data ONTAP: When running t...The following are the top known issues, workarounds, and best practices for ESX/ESXi NFS clients when used with NetApp FAS controllers running Data ONTAP 7-Mode or clustered Data ONTAP: When running the ESXi 5.5 Update 1, the ESXi host intermittently loses connectivity to NFS storage and an All Paths Down (APD) condition to NFS volumes is observed. This issue is most often seen after a host upgrade to ESXi 5.x or the addition of an ESXi 5.x host to the environment.