RESTORE WITH NORECOVERY sQL

Question

What is the need of "NORECOVERY" option,while restoring the database in SQL SERVER?

One situation in which Server 02 is acting as mirror server in partnership with server 01 ;when mirroring a database DB1990.What is the need of mentioning the NONRECOVERY option,while restoring the fulldatabase backup and the log backups?

• a) Backup DB1990 on server01 by using full backup

  b) Restore the full database backup of DB1990 by using a norecovery option on server02 as DB1990

c) Backup DB1990 on server01 by using transactional log backup .Restore the transactional log backup using the Non recovery option on server02

What is the need of nonrecovery option over here?

Answer 1

In a mirroring session , the mirror database is always in a restoring state. The reason is The principal database is constantly sending logs to the mirror database and Mirror database is constantly restoring these logs on its self.

Therefore before starting a mirroring session between two servers you are required to do a full backup restore with NORECOVERY , which leaves the database in restoring state and logs can be applied.