Can we take backup when the database is down?

Can you backup a database that is offline?

A cold backup, also called an offline backup, is a database backup during which the database is offline and not accessible to update. This is the safest way to back up because it avoids the risk of copying data that may be in the process of being updated.

When should I backup my database?

The short answer to "How often should I backup my data?" is "periodically and as often as necessary to minimize the consequences of data loss." Typically, that translates to a full backup every week and a backup of each day's transactions at least once daily.

Can you backup a database?

Right-click the database that you wish to backup, point to Tasks, and then select Back Up.... In the Back Up Database dialog box, the database that you selected appears in the drop-down list (which you can change to any other database on the server).

How do I backup an offline SQL Server database?

If the database is offline all you will need to do is copy the mdf, ldf(s), and ndf(s). The database will have at least one datafile, mdf, at least one log file, ldf, and possibly additional data files, ndf(s). These are the extensions of the files and are what make up the database.