The newly released ESX 3.5 U3 adds support for the VMDK Recovery tool, a script intended to help you recover VMFS/vmdk data stores from accidental deletion of VMFS/vmdk data store or physical disk corruption. For more information, see VMDK Recovery Tool (ESX 3.5 Update 3) (KB 1007243).
To use the tool:
Log in to the service console and enter the vmfs-undelete command. Select option [b]. This lists all the virtual machines registered on your host.
Either select [99] to back up a vmdk blocklist of all the virtual machines, or select a number from the virtual machine list to back up a specific virtual machine.
