The key to that KB article is in the quote -"f you look in Target Identifier, you see the vmhbaW:X:Y:Z where the extent is to be placed. If your original disk was vmhba1:0:0:1 , that extent is created on vmhba1:0:0:2 ." the syntax is for the vmhbaw.x.y.z is w is the ESX Host HBA, x is the Storage Processor, y is the LUN and z is the partion on the LUN - in your case the storage is identified as vmhba0:1:1 so when you add the extent you will have the original VMFS datastore on vmhba0:1:1:1 and the extent will be on vmhba0:1:1:2 -
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