I'm trying to set up a cascaded SnapMirror relationship between B-C where A-B is already in place. When I try and initialize the B-C mirror, the A-B SnapMirror becomes busy and won't complete an update, apparently until this completes. This will take the protection outside the desired RPO.
Is there any way around this, do I simply need to ask the source filer admin to create an additional snapshot?