I didn’t read past the first paragraph before I formed the opinion that running all your VMs on a file system like this is a terrible idea.

If you can’t afford an enterprise SAN (I’m not even talking a NAS, I mean a real fiberchannel-based block-store) for your virtual environment (and I get it - many cannot) then just do yourself a favor and run on local disk.

The reduction in moving parts will dividends. I promise.