missing /vmfs/volumes/ after loss of power

Hi,

after loss of power (behind USV/UPS) one Virtual Machine in our ESXi 5.1 is listed as "Unknown".

Connecting via SSH and "cat /etc/vmware/hostd/vmInventory.xml" displayed the missing VM with the following config:

<vmxCfgPath>/vmfs/volumes/51c02e59-d89b8808-c478-20cf30f0ce6c/W2K12R2/W2K12R2.vmx

This UUID 51c02e59-d89b8808-c478-20cf30f0ce6c does not exist in folder /vmfs/volumes/.

How can I restore this folder???

Thanks for any suggestions.

Peter

PS: I´m speaking better german than english