Failover sites key to surviving disaster
Joel Dubin, CISSP, Contributor
10.18.2007
Rating: -3.88- (out of 5)
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If a disaster takes out one or more of your facilities, it's crucial that you have a failover site waiting in the wings. A failover site is a location where you can temporarily run the business while your primary location is being repaired, rebuilt or brought back into service. There are three types -- hot, warm, and cold -- and which type you choose can mean the difference between maintaining or losing business continuity.
The most complicated setup, particularly for small and medium-sized businesses (SMBs), is a hot site. A hot site is an exact replica of your existing site, complete with duplicate facilities and equipment, IT or otherwise. It needs constant upkeep so it will be ready when the worst happens -- it also needs power and utility hookups that are identical to those at your primary site. While a hot site is the best of the three options in terms of performance, understandably it is also the most expensive.
The other extreme is a cold site, which is essentially just a bare facility. It could be anywhere -– a rented room, a vacant warehouse or any other unequipped location ready for immediate move-in during a disaster. This is certainly the cheapest of the three failover site options, and, possibly, the only affordable one for some SMBs. But think twice before designating an empty office advertised in the newspaper as your failover site. A cold site has to be completely equipped during a disaster, which takes money, and could mean significant downtime during crucial business activities.
The third option, a warm site, is the middle-of-the-road approach --it's part hot and part cold. While not completely equipped or ready, it is partially equipped with utility links that can be turned on as needed at a moment's notice. SMBs have several options when it comes to warm sites, including colocation -- sharing a failover site with other small companies. Of course, if the other companies are affected by t
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he same natural disaster at the same time as your SMB, it could get awfully crowded, awfully quick.
The outsourcing option
Another option is to outsource disaster recovery operations, and there are a number of vendors that specialize in SMBs. Among them is SunGard Availability Services LP, which has an extensive network of data centers around the country that can be converted into temporary locations for your business at short notice. In addition, the Wayne, Pa.-based company has a mobile team that can assist in setting up a location closer to home, if needed.
Another 9 LLC, which acquired SMB disaster recovery vendor Savvy Networks Inc. last year and SolidSpace LLC, also offers colocation disaster recovery services for SMBs.
If you decide to go with an outsourcer for your backup facilities, ask yourself the following questions:
Is it available 24 hours a day, 365 days a year?
Evaluate via risk analysis
Conducting a risk analysis that identifies your SMB's key core and critical activities will also help you decide which type of failover site is best for your SMB. A thorough risk analysis should:
As morbid as these thoughts might be, a disaster recover plan has to take extreme situations into account.
Ultimately, whether you decide on hot or cold, warm or outsourced, your failover site must be in a safe area away from fires, floodplains, coastal areas, earthquake zones or terrorist targets. The important thing to remember is that with a well-chosen failover site, SMBs of all sizes can survive disaster.
Joel Dubin, CISSP, is an independent computer security consultant. He is a Microsoft MVP specializing in Web and application security, and is the author of The Little Black Book of Computer Security, available from Amazon. He has a radio show in Chicago on computer security and runs The IT Security Blog at www.theitsecurityguy.com.
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