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Backup for Safety

The last major part of taking care of your hard drive is ensuring that your data is fault tolerant by means of properly planned and performed backups. There are five types of backup that you can perform on your systems, and although they are pretty much common knowledge, they deserve a quick review before we move on.

  • Normal backup— Copies all selected files and marks each file as having been backed up (the archive attribute is cleared). Only the most recent copy of the backup file is required to perform restoration.

  • Incremental backup— Copies only those files created or changed since the last normal or incremental backup; the archive attribute is then cleared. Using normal and incremental backups, you will require the last normal backup and all incremental backups in order to perform restoration.

  • Copy backup— Copies all selected files but does not mark each file as having been backed up (the archive attribute is not cleared). Copy backups have no effect on any other type of backup operation.

  • Daily backup— Copies all selected files that have been modified the day the daily backup is performed; the archive attribute is not cleared in this case.

  • Differential backup— Copies files created or changed since the last normal or incremental backup; clears the archive attribute.


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