Non-VI workload detected on the datastore.
A datastore is managed by SIOC. The SIOC has detected that an external party is contributing to I/O congestion on a datastore. The external workload may be caused by a third-party backup solution accessing a VM snapshot on the datastore, system operations performed by the storage array or incorrect datastore configuration.
Check if non-VI workload can be avoided, so that SIOC can properly and most effectively allocate storage traffic between virtual machines.
Refer to VMware Knowledge Base for more information about supported datastore configuration.