24.4. What Needs to Be Backed Up?Just about everything in a corporate environment needs to be backed up. The more important question to ask is what needs to be restored and how quickly does it need to be restored. As discussed in the disaster recovery section, you must define recovery requirements for every piece of data in your company. The primary reason for performing backups is to provide continuous access to a corporation's data in the event the primary copy of data is unavailable. Companies need to back up three types of data:
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