The reason I asked was to understand whether the original partition type was MBR or GPT and the start sector was 128 or 2048.
With the information you provided, take a look at Recovering a lost partition table with a VMFS datastore | vInfrastructure Blog for details about how to "Recover a lost VMFS partition on a GPT disk". If you have question, pease don't hesitate to ask before you run the command to create the partition.
André