Were these devices presented to VMware servers at one time? These may be stuck VAAI sessions... if you open a case with EMC Support, the PSE lab should be able to dial-in and clear them.
We have two meta volumes on my VMAX 40K that I cannot unbind / dissolve / delete because they are being used as a Copy Session source or target, see error below:  symconfigure -cmd "unbind tdev XXXX from pool ;" prep  A Configuration Change operation is in progress. Please wait...     Establishing a configuration change session...............Established.     Error occurred while Defining change number 1:     Cannot use the device for this function because it is a Copy Session source     Device XXXX generated the failure     Terminating the configuration change session..............Done. The configuration change session has failed.  symdev show XXXX   Extent Based Clone     : Source    We have not knowingly created any copy sessions.  These two volumes are no longer in use.  How can we clear the copy or extent based clone session so we can remove these volumes?  Thanks in advanced
Cannot unbind volume because it is a Copy Session source/target