Restoring from Async Mirror Members

The following considerations apply when restoring from mirrored databases created on async mirror members:

Mirrored databases backups created on a async mirror member can be restored to any async member of the same mirror.
Mirrored databases backups created on a async mirror member can only be used to create new copies of the mirrored database (that is, they cannot be restored over an existing mirrored database on a failover member).