VMware vSphere

I have a Supermicro AS-2023US-TR4 with dual AMD EPYC 7501 processors and 512 GB of ram running ESXi 6.5.0 Update 1 (Build 5969303). I have an Intel X710-da2 with two 10gig fiber links for storage on a VLAN to a "SAN" which is a Supermicro 5048R-E1CR36L with the same nic. The storage server is running FreeNAS 11.1-U1 and I have 3 raid z3 volumes with datasets underneath. I then share those datasets with NFS4 to the vmware server.

Now it shows type as "unknown" but they operate just fine. Nothing shows up under adapters and or devices. Now it's always shown that as long as I have switched from iscsi to nfs on vmware 5.5 and up on NFS3 and NFS4. But I have a VMWare specialist consulting for me and he said he was "worried" that is showed unknown and nothing showed up under adapters or devices.

As you can see I have been playing around with zvols versus datasets and NFS3 vs NFS4... I don't use iSCSI, I've always found NFS to be significantly faster even using Synology, QNAP and FreeNAS. Also, I've had issues with iSCSI just vanishing from the ESXi host and causing all sorts of problems. NFS has always been more reliable - it just shows as "unknown". Not a big deal to me personally but a worry for my consultant.

There's no cause for concern because the drive types show as "Unknown" as this is just an indication that the storage subsystem is not advertising what physical media is providing the storage. In the case of NFS, I don't believe it ever shows as anything other than Unknown while block-based storage can optionally show that if the storage supports it.