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Backup disaster site

One of the most important aspects of disaster recovery is to have a location from which the recovery can take place. This location is known as a backup site. In the event of a disaster, a backup site is the place from where the operation will get shifted and one will operate from there for the length of the disaster.
There are three different styles of backup sites, depending on the effort required to begin operations in the event of a disaster:

  1. Cold sites
  2. Warm sites
  3. Hot sites

Cold Site
A cold backup site is the least expensive site where an appropriately configured space in a building is kept. Things required to start the restore service are to be arranged to begin recovery operation. The time required to start full operation can be substantial.
Warm site
A warm backup site is kept ready with all required equipment, and the operation starts by restoring data from backup devices.
Hot site
A hot backup site is a fully ready site with with all systems configured and waiting only for the last backups of your user data from your off-site storage facility. A hot backup site can often be brought up to full production in no more than a few hours. A hot backup site is the most expensive approach to disaster recovery.
A number of things are to be considered while selecting the backup site – e.g. the location of the backup site, the configuration of the backup site, the type of the backup site, etc.