My Idea, is that we need to port some self audition system inside node itself.
When data loaded, satelite will send to node audit hashes and node will make audit of its data all the time like round robin. Report to satellite. If node data curruption found then by self audition, then Satelite try to audit this area. Like this lost and curapted data, can be found very easy and much faster.
Also if data get curuted and node get DQ, not curupted data can be self audited and make GE for safe audited data.