Vmfs Partition Table Recovery Page

The VMFS partition table was created when the SAN array was first configured for use with ESXi. It was a critical component, allowing the ESXi server to locate and access the VM files stored on the array. Without a valid partition table, the ESXi server couldn't find the VM files, and the VMs wouldn't boot.

TestDisk can scan raw devices for lost partitions, including VMFS types. vmfs partition table recovery