VMware: vSAN Disk Group Cache Drive Dead or Error (VSAN Absent Disk)

Summary:
A cache disk failed in my host taking along with it the disk group.  This is expected behavior, but for some reason, the disk group also disappeared from GUI so I couldn't decommission the disk group to basically replace the cached drive.  So, had to do it through powercli/esxcli.  Wish I took a screenshot, cause it was kind of annoying.

 PowerCLI Example:

 Once you've deleted the offending disk group, you can now create a new disk group utilizing the replaced cache disk and former capacity disks.

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