AHCI has "known issues" with VSAN?
Really? Given that AHCI is a default industry standard for cheap SATA controllers to emulate (including a lot of the on-board controllers on most motherboards), I somewhat suspect that should be
"VSAN has a known issue with AHCI"
Given that the rest of the bloody planet has figured out how to work with these controllers, I somewhat suspect vmware are doing something wrong.