I have a similar issue. I use VMware ESXi 5.5.0 u1, and after a power failure, when the system was back online, I haven't been able to see any of my local datastores (2 ssd disks, and 1 sata hdd).
It prompts to create new datastores, I can see my LUN devices, but I loose all the data if I will complete the Add Storage... process. I've searched the web but I couldn't find a solution to recover my datastores yet. Is there something locked? How I can recover the datastores?