SQL SERVER – Msg 3035, Level 16 – Cannot Perform a Differential Backup for Database “SQLAuthority”, Because a Current Database Backup Does not Exist

If we look at the error in the subject line, it is very clear that a full backup is needed so that the differential backup chain can be initiated. If this happens to a newly created database, then it makes sense and there is no need for me to write a blog. There was an interesting finding about the cause of this error, other than obvious one, so sharing it. Let us see another error related to differential backup.

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SQL SERVER – Cannot open backup device. Operating system error 1326 (Logon failure: unknown user name or bad password.)

There might be various reasons for above error, but this case is very specific to a situation where SQL Server was installed on a machine which was in Workgroup whereas the backup destination was the server located in the domain. Here is the error message seen in SQL Agent job history. Let us learn about how to fix Operating system error 1326.

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SQL SERVER – FIX Error 5120 – Database is in Read Only Mode After Attaching Files

Sometimes you need to know more about permissions on file, service account etc. to fix certain errors. In my recent visit to a customer location, one of the database developers came to me with a problem. He said that when he attaches MDF and LDF file to the SQL instance, attach is successful, but the issue was next to database name it was saying read-only. Let us see how we can FIX Error 5120.

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