New Hard disk size is limited to 15.81 TB

Hi,

We are running Vcenter 6.0 on EXSi 6.0 Host, We are using NetApp to manage the data stores. I have created a datastore volume of 32TB and would like to assign it to one of the VMs, when i go to Vcenter webclient or even to the EXSi host which has the VM to add a Hard disk on that VM through VM settings, it is not letting me create a disk larger than 15.81 TB. can someone please provide some guidance.

Thanks