In this video presentation which is part of the Hancock’s VMware Half Hour I will show you HOW TO: Manually remove a failed vSAN disk group from a VMware vSphere vSAN cluster using ESXCLI.
The VMware vSphere vCenter Server web client has difficulty in performing some vSAN actions, so we need to connect via SSH to the bash shell of the ESXI host to perform this action using the following command
esxcli vsan storage remove -u <VSAN Disk Group UUID>
see here
How to manually remove and recreate a vSAN disk group using esxcli