Follow-up information: Installed ESXi 6.5 and now the disk device status shows as normal. However when creating data-store, no devices show as available to choose from. This is the ESXi ISO image from VMWare site. Wondering it this requires the DELL Custom vSphere version instead.
The R710 is only certified for 5.5 and 6.0.x. Your H700 indicate that you have a later R710. We always use the Dell Custom ISO. Iam pretty sure that i have some Dell 11.Gen with ESXi 6.5 around taking a quick look i didnt find a single one.
From what i have seen in the past. If there was already a Filesystem on a Device the ESXi sometime refuse to create a VMFS(Datastore) on. So i wipe it.