I have a WMware ESXi 4.0 running with 3 WM (windows servers). Yesterday I rebooted all 3 WM and since then passthrough is no longer working.
I have 2 USB drives for backups and it all was working fine before rebooting the the WMs. I did not reboot the ESXi host.
Now under Configuration > Advanced Settings I see "Host does not support passthrough configuration". And Configure Passthrough is grayed out
Any ideas why?