Remote recovery sites: What distance is far enough?

It has become a widely accepted fact that an increasing number of organizations have to manage and protect massive amounts of data on a daily basis. It is also a known fact that, while most IT departments are comfortable with the success rate of their tape-based backups, most know that they likely could not restore from backup tapes within the business' recovery time objective (RTO). This has lead to an increase in popularity of disk-based backups and remote data replication products of all sizes.

Many companies have implemented or at least considered the implementation of a data replication product at a remote site. It has become clear to many that the only way they could ever hope to regain access to their business' critical data within established RTO is through remote data replication. However, what is the actual definition of "remote" in a recovery situation, and how far away is far enough?

The same questions resurface on a regular basis: What is the industry norm f

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or the distance between production and alternate or DR sites? Are there legal requirements? What are other companies doing?

The short answer is that there are no standards or specific rules at this point in time -- even the SEC recognized that imposing a "one size fits all" ruling wouldn't be a simple task (Click here for more information). The reasoning is that threats and probabilities vary widely between geographies. While 10 miles between two sites may be suitable in the event of a tornado or a fire, this distance would be insufficient in areas prone to hurricanes, for example, like the Gulf Coast after Hurricane Katrina.

Numerous factors must be considered when establishing the distance that should separate two sites. They can be summarized as follows:

Regular risk assessment and business impact analyses will ease the task of measuring potential losses. These two business continuity elements should also be part of any sound enterprise risk management program.

For more information:

New backup strategies

About the author: Pierre Dorion is a certified business continuity professional for Mainland Information Systems Inc.

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