{"id":691,"date":"2015-03-31T09:58:55","date_gmt":"2015-03-31T16:58:55","guid":{"rendered":"http:\/\/3.209.169.194\/blogs\/erin\/?p=691"},"modified":"2018-12-14T09:11:08","modified_gmt":"2018-12-14T17:11:08","slug":"backup-checksum-default-option-in-sql-server-2014","status":"publish","type":"post","link":"https:\/\/www.sqlskills.com\/blogs\/erin\/backup-checksum-default-option-in-sql-server-2014\/","title":{"rendered":"Backup checksum default option in SQL Server 2014"},"content":{"rendered":"

The SQL Server team snuck in a new server configuration option in the 2014 release (I bet thanks to this Connect item even though it’s still Active), and it’s not documented so I just stumbled upon it recently.\u00a0 If you run:<\/p>\n

SELECT * FROM [sys].[configurations] ORDER BY [name];<\/p>\n

you’ll see that there are 70 rows in the output (in 2012 there were 69) and the new one is:<\/p>\n

backup checksum default<\/p>\n

The option is disabled (set to 0) by default.\u00a0 To enable it, simply run:<\/p>\n

EXEC sp_configure ‘backup checksum default’, 1; GO RECONFIGURE WITH OVERRIDE; GO<\/p>\n

As a quick reminder, adding the CHECKSUM syntax to the backup command forces SQL Server to verify any existing page checksums as it reads pages for the backup, and it calculates a checksum over the entire backup.\u00a0 Remember that this does not replace CHECKDB (check out Paul’s post – A SQL Server DBA myth a day: (27\/30) use BACKUP WITH CHECKSUM to replace DBCC CHECKDB<\/a> – for more details).\u00a0 So what does this server option do?\u00a0 Well, since it’s not yet documented (I filed a Connect item here) I did some testing to confirm what I was expecting.<\/p>\n

Within Management Studio I ran a simple backup statement:<\/p>\n

BACKUP DATABASE [AdventureWorks2014] TO\u00a0 DISK = N’C:\\Backups\\AdventureWorks2014_checksumtest.bak’;<\/p>\n

Then I checked the output in msdb:<\/p>\n

SELECT [bs].[database_name], [bs].[backup_start_date], [bs].[backup_finish_date], [bs].[has_backup_checksums], [bs].[user_name], [bm].[physical_device_name] FROM [msdb]..[backupset] [bs] JOIN [msdb]..[backupmediafamily] [bm] on [bs].[media_set_id] = [bm].[media_set_id];<\/p>\n

\"Backup<\/a>
Backup information from msdb<\/figcaption><\/figure>\n

 <\/p>\n

Check it out…with the server option enabled, I don’t have to include the CHECKSUM syntax to have SQL Server perform the backup checksum.<\/p>\n

If you’re running SQL Server 2014, I highly recommend enabling this option for your instances, and if you rely on Glenn’s scripts for instance reviews, I know he’s adding a note about this to the next set \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"

The SQL Server team snuck in a new server configuration option in the 2014 release (I bet thanks to this Connect item even though it’s still Active), and it’s not documented so I just stumbled upon it recently.\u00a0 If you run: SELECT * FROM [sys].[configurations] ORDER BY [name]; you’ll see that there are 70 rows […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40],"tags":[41],"yoast_head":"\nBackup checksum default option in SQL Server 2014 - Erin Stellato<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sqlskills.com\/blogs\/erin\/backup-checksum-default-option-in-sql-server-2014\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Backup checksum default option in SQL Server 2014 - Erin Stellato\" \/>\n<meta property=\"og:description\" content=\"The SQL Server team snuck in a new server configuration option in the 2014 release (I bet thanks to this Connect item even though it’s still Active), and it’s not documented so I just stumbled upon it recently.\u00a0 If you run: SELECT * FROM [sys].[configurations] ORDER BY [name]; 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