I noticed that Unisphere will not let you create WIL LUn's on pools , this behaviour is according to emc254739 .
Will this change in future releases ?
Now the only option for a customer that has the intention to use all available storage in pools, would be to use the vault drives, which is not recommended.
Not sure if Unisphere will allow placing the WIL on the vault drives , anyone tried ?
You can put the WIL on the 4 vault drives, you get a warning message