I have two HPE DL380G9 servers, with the following drive configurations (identical on both servers):
9 SAS drives in Raid 5 with 2 Logical disks
another 9 SAS drives in Raid 5 with a single Logical disk
and another 3 SSD disks as raid 5
Both servers have 10GB NICs that are connected to a 10GB switch.
Both servers have ESXi 6.5 HPE optimized installed on them and have VSA installed on each one with a Fail Over Manager.
However, When I try to add the volume I configured on the VSA cluster, it appears as normal, degraded.
Some googling pointed out that It could be an issue with single pathing - I reconfigured the network to have 2 port groups on the 10GB vSwitch to enable multipathing for the ESXi and yet, even after rescanning, I still get normal, degraded.