From the course: Career Essentials in System Administration by Microsoft and LinkedIn

Different backup types for different types of organizations

From the course: Career Essentials in System Administration by Microsoft and LinkedIn

Different backup types for different types of organizations

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- [Instructor] When you go to back up your servers using third-party applications, you'll have more options than using the built-in backup utilities in the operating systems. Let's take a look at the five major types of backups you may encounter to help any CIS admin decide which backups are right for you. In a full backup, all data is copied so it can be restored on this computer or another. It includes files to allow a bare-metal restore, such as the system state and the registry. A full backup will reset the archive bit as you see here. When a file gets backed up, the A bit on the left goes away. When a file has changed the A or archive bit reappears and the backup job knows to back up the changed file and reset the bit. An incremental backup will only backup files since the last full backup job. It then resets the archive bit for the next day. Incrementals are faster to back up each day and use less space than a differential backup. To restore an incremental job, every incremental backup to the last full backup must be good or you may lose data. Differential backups will back up any files that have changed and show the archive bit since the last backup. The job doesn't reset the archive bit, so every day the same files that have changed since the last full backup will be backed up again until the next full backup. An advantage of the differential is that you only need two backups to get a full restorable backup, the last full job and the last differential. The disadvantage is that it uses more space and it takes longer to back up until the next full backup happens. A daily backup doesn't use the archive bit. It will simply back up data based on date. It can back up on a schedule as well. The daily backup is mostly outdated due to the advantage of the efficient archive bit. It is not as supported as it once was and it's difficult to create a backup rotation based on days, rather than based on when a file has changed. This is a backup that can be done using a simple utility like Robocopy or a higher end utility or application. It doesn't take into count any archive bits, it simply copies data and overrides any files that exist with newer ones unless told otherwise. Backups can be done many different ways, so be sure to pick the right one based on your organization.

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