When vSAN Express Storage Architecture (ESA) is selected as the primary storage for deploying VMware Cloud Foundation (VCF) 5.x, the Cloud Builder Appliance will validate the system against the vSAN ESA HCL and will block the deployment if the hardware components are non-compliant.
For a production deployment, this should be the default experience but for non-production or proof-of-concept (POC), this can be annoying if you wish to accept the risk and proceed with using non-certified vSAN ESA hardware.
Today, the most viable workaround is to install the vSAN ESA Hardware Mock VIB , which will allow users to proceed with the deployment but it does require the additional installation step for each ESXi host.
Having spoken with VCF Engineering about this topic awhile back, they have introduced a nice enhancement with the latest release of VCF 5.2.2 that will allow users to easily bypass the vSAN ESA HCL check without requiring additional ESXi configurations changes.
