SAN FRANCISCO, March 11 /PRNewswire/ --

- Digital Realty Trust Turn-Key Datacenters(SM) Provide Highly Reliable Environment for Mission Critical IT Infrastructure

Digital Realty Trust, Inc. (NYSE: DLR), the world's largest wholesale datacenter provider, has achieved five 9s of uptime in its Turn-Key Datacenters(SM) once again with a another year of 99.999% availability across its portfolio of facilities in North America and Europe in 2008. These uptime metrics are based on a comprehensive evaluation of the company's Turn-Key Datacenter(SM) facilities in the US and Europe using standard industry methodology.

This is a great validation of how well designed our datacenters are and how skilled our operations team is. We have exceeded the five-9s benchmark for four straight years going back to our first year in business as a public company, and we have been able to do that while dramatically increasing the number of facilities we own and operate. Our industrialized approach has proven itself to be applicable not only in construction, but in facility operations as well, said Ted Martin, Vice President, Technical Operations at Digital Realty Trust. Our unique approach to planning and building Turn-Key Datacenters plays an important role in their reliability. Equally important, however, is the intensive commissioning, maintenance processes and advanced monitoring systems through our Critical Facilities Management(SM) program that we use to test, fine tune and maintain these data centers.

Martin added, At many data center facilities, uptime is often highly inconsistent and may only average in the four-9s or three-9s range. That may not sound like a big difference, but that's going from an average of less than 5 minutes of downtime for a five 9s facility to more than 500 minutes of downtime for a facility with reliability only in the three 9s range. Being in a facility that has a consistent track record of uptime is key for any mission critical data center.

Digital Realty Trust Turn-Key Datacenter(SM) facilities provide state-of-the-art environments for supporting mission critical infrastructure, with advanced cooling, power, redundancy, and sustainability features to ensure that critical applications are available while optimizing energy efficiency. Digital Realty Trust's Turn-Key Datacenters(SM) are scalable from hundreds of kilowatts of IT Load to megawatts of IT load and are located in markets throughout North America and Europe. Each Turn-Key Datacenter(SM) facility is physically secure and features a state-of-the-art power and cooling architecture that has been optimized for green operation. Every Turn-Key Datacenter(SM) is built using the company's proprietary POD Architecture(SM) and uses metered power to ensure that clients pay only for the power that they use.

Only Digital Realty Trust's Critical Facilities Management(SM) program combines the three most important elements (manpower, documentation and systems management) of successful data center operations management within a single offering. Digital Realty Trust draws upon its expertise of managing approximately two million square feet of data center space worldwide in developing this data center management solution. This high level of experience has enabled us to develop an offering that assists customers in optimizing the efficiency of their data centers to increase cost effectiveness and green operation. Unlike other providers who provide only partial monitoring and data center management solutions, Digital Realty Trust has adopted a best-of-breed strategy to bring the industry leading Building Management System (BMS), Security Access Control System (SACS), and Computerized Maintenance Management System (CMMS) platforms together in a single offering to provide users with the most comprehensive monitoring and control capability possible via our secure communications network.

About Digital Realty Trust, Inc.

Digital Realty Trust owns, acquires, redevelops, develops and manages technology-related real estate. The Company is focused on providing Turn-Key Datacenter(SM) and Powered Base Building(SM) datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and internet enterprises, to manufacturing and financial services. Digital Realty Trust's 75 properties, excluding one property held as an investment in an unconsolidated joint venture, contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise datacenter tenants. Comprising approximately 13.0 million square feet as of February 26, 2009, including 1.6 million square feet of space held for redevelopment, Digital Realty Trust's portfolio is located in 27 markets throughout Europe and North America. For additional information, please visit Digital Realty Trust's website at http://www.digitalrealtytrust.com.

Safe Harbor Statement

This press release contains forward-looking statements which are based on current expectations, forecasts and assumptions that involve risks and uncertainties that could cause actual outcomes and results to differ materially, including statements related to future reliability of our Turn-Key Datacenters(SM). These risks and uncertainties include the impact of the current deterioration in the global economy, including the turmoil in the financial and credit markets; the downturn of local economic conditions in our geographic markets; decreases in information technology spending, including as a result of economic slowdowns or recession; adverse economic or real estate developments in our industry or the industry sectors that we sell to; decreases in real estate valuations and resulting impairment charges; our dependence upon significant tenants; bankruptcy or insolvency of one or more major tenants or a significant number of smaller tenants; defaults on or non-renewal of leases by tenants; our failure to obtain necessary debt and equity financing for refinancing current debt obligations, undertaking or completing redevelopment, completing acquisitions or other purposes; increased interest rates and operating costs; our failure to repay debt when due or our breach of covenants or other terms contained in our loan documents; financial market fluctuations; changes in foreign currency exchange rates; our ability to manage our growth effectively; difficulty acquiring or operating properties in foreign jurisdictions; our failure to successfully operate acquired or redeveloped properties; risks related to joint venture investments, including as a result of our lack of control of certain of these investments; delays or unexpected costs in development or redevelopment of properties; decreased rental rates or increased vacancy rates; increased competition or available supply of data center space; inability to successfully redevelop and lease new properties and space held for redevelopment; difficulties in identifying properties to acquire and completing acquisitions; our inability to acquire off-market properties; our inability to comply with the rules and regulations applicable to public companies; our failure to maintain our status as a REIT; possible adverse changes to tax laws; restrictions on our ability to engage in certain business activities; environmental uncertainties and risks related to natural disasters; changes in foreign laws and regulations, including those related to taxation and real estate ownership and operation; changes in real estate and zoning laws; and increases in real property tax rates. For a further list and description of such risks and uncertainties, see the reports and other filings by the Company with the United States Securities and Exchange Commission, including the Company's annual report on Form 10-K for the year ended December 31, 2008. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

For Additional Information: A. William Stein Pamela A. Matthews Chief Financial Officer and Investor/Analyst Information Chief Investment Officer Digital Realty Trust, Inc. Digital Realty Trust, Inc. +1-415-738-6500 +1-415-738-6500 Chris Crosby Sales Technical Services Digital Realty Trust, Inc. +1-214-231-1350

A. William Stein, Chief Financial Officer and Chief Investment Officer, +1-415-738-6500, or Pamela A. Matthews, Investor/Analyst Information, +1-415-738-6500, or Chris Crosby, Sales Technical Services, +1-214-231-1350, all of Digital Realty Trust, Inc.