Back up terminologies #2

• Copy backup
  Backs up the selected files, but does not mark the files as backed up (reset the archive bit). This is found in the backup with Windows 2003.
• Cumulative incremental backup
  A differential backup used by NetBackup.
• Daily backup
  Incremental backup used by Windows Server 2003.
• Data salvage
  The process of recovering data from storage devices when the normal operational methods are impossible. This process is typically performed by specialists in controlled environments with special tools. For example, a crashed hard disk may still have data on it even though it doesn't work properly. A data salvage specialist might be able to recover much of the original data by opening it up in a clean room and tinkering with the internal parts.
• Differential backup
  A cumulative backup of all changes made since the last full backup. The advantage to this is the quicker recovery time, requiring only a full backup and the latest differential backup to restore the system. The disadvantage is that for each day elapsed since the last full backup, more data needs to be backed up, especially if a majority of the data has been changed.
• Differential incremental backup
  An incremental backup used by NetBackup.
• Disaster recovery
  The process of recovering after a business disaster and restoring or recreating data. One of the main purposes of creating backups is to facilitate a successful disaster recovery. For maximum effectiveness, this process should be planned in advance and audited.
• Disk image
  A method of backing up a whole disk or filesystem in a single image. Since the underlying data structures are what is actually backed up, this method does not allow for file level control over what is selected for backup or restore.