disaster recovery

Disaster Recovery is a coordinated process of restoring data, infrastructure, and systems required to support business operations. Disaster recovery is a concept developed as computer center managers began to recognize the dependence of their organizations on their computer systems; As IT systems become increasingly critical to the operation of any company and arguably the global economy as a whole, the importance of ensuring the continued operation of those systems, or the rapid recovery of the systems, has increased as well.

Question: What kind of a business should expect to have to deal with a backup and disaster recovery plan?

Answer: All of them.

No organization on earth can presume that they will never have to deal with a disaster recovery situation. Every business we have known, has in some shape or another, dealt with the bad news of failed hard drives, crashed servers, virus and other malware infections; and yes, even targeted attacks from the outside.

Lets review the various approaches to backup and business continuity:

Approach 1: Tape Backup with Off-site Tape Rotation
Simple, cost effective data protection solution. Tape back-up guards against individual server and data center failures. Tape Back-up is not a true disaster recovery option because the time to recover your data and systems takes too long (RTO of 8 days for the lowest amount of data backed up). However, for those with limited budget and flexible RPO and RTO requirements may find this acceptable.

Approach 2: Cold Site
Servers have been built in a separate facility, and are ready to be deployed in the event of a disaster.

Approach 3: Warm Site
Servers are online in a separate facility and applications are pre-loaded. Some manual reconfiguration may be required before deployment.

Approach 4: Hot Site
Servers are live and data is replicated real-time to a separate facility. Fail-over to the secondary site can be achieved automatically through tools or manually