External backups are full copies of the database saved to a datastore separate from the database. This section describes the pros and cons of using external backups.

External backups use about the same amount of storage as the database itself. Because they reside on a separate disk from the database, external backups provide resiliency and benefits such as the following.

External backups protect against data loss due to failure of the primary data storage device.

External backup storage is more cost effective than using the primary data storage for backups.

You can extend the data disk as needed.

The following are points to consider about using external backups.

External backups can take a long time. Large amounts of data must be copied across devices.

Each backup uses the full size of the data disk on the backup storage device.