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LUN lost, how to recover data?
Aite Data Recovery answers for you: When a LUN contains a copy of a VMFS datastore, you can mount the datastore with an existing signature or by assigning a new signature. Each VMFS datastore created in a LUN has a unique UUID, which is stored in the file system superblock. After copying a LUN or generating a snapshot, every byte of the generated LUN copy is exactly the same as the original LUN. Therefore, if the original LUN contains a VMFS datastore with UUID X, the LUN copy will show that it contains the same VMFS datastore or a VMFS datastore copy with exactly the same UUID X. ..

ESX can determine whether a LUN contains a copy of a VMFS datastore and mount the datastore copy with its original UUID, or change the UUID to re-sign the datastore.

The above is more professional. To be on the safe side, visit Aite data center first, and then make further plans. I hope it helps you!