Mirror Database Preparation

Whether starting mirroring for the first time or starting it again after mirroring was removed, verify that the mirror database is prepared for mirroring.
When you create the mirror database on the mirror server, make sure that you restore the backup of the principal database specifying the same database name WITH NORECOVERY. Also, all log backups created after that backup was taken must also be applied, again WITH NORECOVERY.
Also, we recommend that, if it is possible, the file path (including the drive letter) of the mirror database be identical to the path of the principal database. If the file paths must differ, for example, if the principal database is on drive 'F:' but the mirror system lacks an F: drive, you must include the MOVE option in the RESTORE statement.

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