A snapmirror target is read-only unless you break the mirror. You can safely mount (if in cDoT) and export/share a live target without taking a snapshot first. If the snapmirror is broken off, allowing the target to become writable, then yes, taking a snapshot of the target and exporting the snapshot would serve the same purpose.
I hope this helps you.
Lead Storage Engineer
Huron Legal | Huron Consulting Group
NCDA, NCIE - SAN Clustered, Data Protection
Kudos and accepted solutions are always appreciated.