Have you ever had situations where a backup of a SQL database would not restore, and if so what kinds of issues can mean a SQL backup cannot restore into a live or test instance. we are reviewing how well our DBA's test restores, so it would be useful to identify how common it is to find that a MSSQL backup file doesn't restore and how routinely a test restore should be performed for critical database backups. For infor these are all 2008 R2 databases.