You can use the storage assigned to an ESXi host as either a Virtual Machine File System (VMFS) datastore or a raw device mapping (RDM). RDMs are not supported on the NVMe over Fibre Channel protocol.
All 6.x and 7. x versions of ESXi support VMFS versions 5 and 6.
Steps
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Make sure the volumes mapped to the ESXi host have been discovered properly.
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For instructions on creating VMFS datastores using either the vSphere Client or the vSphere Web Client, see the VMware pubs webpage (https://www.vmware.com/support/pubs/) for documentation on this topic.