Microsoft Corporation Staff, IT Professional Staff - Microsoft Windows 2000 Server Operations Guide

Backup can perform several types of backups:

• A normal backup copies all selected files and marks each as having been backed up. With normal backups, you need only the most recent copy of the backup file to restore all of the files.
• An incremental backup backs up only those files created or changed since the last normal or incremental backup. It marks files as having been backed up. If you use a combination of normal and incremental backups, you need the last normal backup set as well as all the incremental backup sets to restore your data.
• A differential backup copies files created or changed since the last normal or incremental backup. It does not mark files as having been backed up. If you are doing normal and differential backups, you must have the last normal and last differential backup sets to restore.
• A copy backup copies all selected files but does not mark each file as having been backed up. Copying is useful to back up files between normal and incremental backups, because it does not affect other backup operations.
• A daily backup copies all selected files that have been modified on the day that the daily backup is performed. The backed up files are not marked as having been backed up.

Note

Perform regular backups when the fewest people are using the network. If many files are in use, the backup might not accurately reflect your network.

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