I think this should do it for SE 7.6.  Symdev –sid xxx unset –persistent yyy
I've seen lots of information about how to use the SE reclaim function with "alloc_type=persistent" to start a reclaim on TDEVs that were bound persistently but I can't seem to find any command that will allow me to change the config of the TDEV to tuen off the "persistent" flag if it is no longer desired. Does such an option exist?
Changing the Persistent Preallocation flag