Do you have 2 separate datastores regardless of that new one added SATA disk?! Both of them are gone now?! Can you explain with more details, please
Where did you install the ESXi host?Please mark my comment as the Correct Answer if this solution resolved your problem
i have solved the problem. As i descibed i switched the Host RAID-Controller to passthrough (foolishly).
So all the disks, even on OS system level /dev/disks... were gone. On the Web-UI this action is irreversible!
Solution was to boot from live linux, mount the partition where
state.tgz resides and change the "passthrough" value of the RAID Controler to "vmkernel"
in the /etc/vmware/esx.conf