You can use the reports wizard and run the LUN reports.  one of them is for thin lun's and will show you how much each thin lun is using  The pool that the thin luns is set by default to send an alert when the pool is at 70% full.  now that will only work if you have the email home setup and working.
 Hi, We just started using thin provisioning for our CX4/480.   Now we have some luns that are using all the space allocated but some luns that are using almost none of the space allocated?  How can I run a report that shows which of the thin provisioned luns are using large amounts of space?  Does anyone have any tips for managing the thin provisioning on a Clariion?  We are afraid we will run out of space unexpectedly.  Thanks,
With thin provisioning, how can I see which luns are using the storage space?