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Stop the Slaughter of Innocents. Congress is bought and paid for by gun lunatics and gun promotion groups. If you want to live in a safe America, help buy Congress back for America. Send a donation to Mayors Against Illegal Guns, 909 Third Avenue, 15th Floor New York, NY 10022


Planning a Backup and Restoration of Files for Disaster Recovery

Planning a backup and restoration of files is the most important step to protect data from accidental loss in the event of data deletion or a hard disk failure. The backup copy can be used to restore lost or damaged data.

For taking backups and restoring files, Microsoft has provided a utility called Backup. The Backup utility creates a copy of data on a hard disk of a computer and archives data on another storage media. Any storage media such as removable disks, tapes, and logical drives can be used as a backup storage.

While taking a backup of files, the Backup utility creates a volume shadow copy of the data to create an accurate copy of the contents. It includes any open files or files that are being used by the system. Users can continue to access the system while the Backup utility is running without the risk of losing data.

Volume Shadow Copy

Backup provides a feature of taking a backup of files that are opened by a user or system. This feature is known as volume shadow copy. Volume shadow copy makes a duplicate copy of all files at the start of the backup process. In this way, files that have changed during the backup process are copied correctly. Due to this feature, applications can continue writing data to the volume during a backup operation, and backups can be scheduled at any time without locking out users.

Types of Backups

The Windows Backup utility provides various types of backups. While planning for a backup strategy, it is important to choose an appropriate type or combination of different types of backups. The backup type determines which files are transferred to the destination media.

Each backup type relates to an attribute maintained by every file known as archive (A). The archive attribute is set when a file is created or changed. When an archive attribute is set, it means that the backup of this file has not been taken or it is due.

Note: When it is said that "The file is marked as backup", it means that the archive attribute of the file has been cleared.

Normal Backups

When an administrator chooses to use a normal backup, all selected files and folders are backed up and the archive attribute of all files are cleared. A normal backup does not use the archive attribute to determine which files to back up. A normal backup is used as the first step of any backup plan. It is used with the combination of other backup types for planning a backup strategy of an organization. Normal backups are the most time-consuming and are resource hungry. Restoration from a normal backup is more efficient than other types of backups.

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