Disaster Planning And Recovery (Part VI)

When a full backup is performed every night, a full restore can be done to recover from a complete loss of data. If a whole system needs to be replicated, then a full backup should be done on the source system and a full restore done on the target system. If the system crashes the day after a full backup, full restore needs to be done to bring it back to its original state.

Doing a full restore involves taking all files that were backed up during a full backup and copying them back to the original system or another system. In most cases, this will involve restoring the operating system as well.

Full restores are almost always done when a system crash has occurred and all files are lost. A system crash could result from failed hardware, such as a failed hard disk on which the files resided. A crash could result from a computer virus that has corrupted the operating system and/or the allocation table of the hard disk. There are many other ways in which corruption or data loss can occur.

No matter how the data was lost or corrupt, doing a full restore is usually the quickest way to get the data back and the system online again. Doing a restore from a full backup almost guarantees that all files will be restored to the state they were in when the backup was done.

If a file has been changed between the time that the full backup was done and the time of the data loss, all changes made to the files are lost.

[tags]diana huggins,data protection,disaster planning & recovery,data loss,backup plan[/tags]

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