Unified Infrastructure Services Establishes Advanced Datacenter in Digital Realty Trust Turn-Key Datacenterâ„¢ Facility

San Francisco – February 11, 2008 – Digital Realty Trust, Inc. (NYSE: DLR), a leading owner and manager of corporate and Internet gateway datacenters, today announced that Unified Infrastructure Services (www.unifiedis.com) has signed a long-term Turn-Key Datacenter™ lease to establish a major new datacenter in a Digital Realty Trust facility in the Dallas/Carrolton, Texas area. The new Turn-Key Datacenter™ will provide expanded infrastructure for UIS’s managed datacenter services.

“UIS has been growing rapidly because our managed services meet the needs of under-served customers: companies that have outgrown the limited services of hosting companies but who are not large enough to devote major budgets to working with the big outsourced IT companies. Demand for our services has been very strong, and this new datacenter allows us to respond quickly to that demand. Being able to establish a new datacenter so quickly and without leveraging our own capital is a huge market advantage for us,” said Ramon A. Guerra Jr., CEO of UIS.

Lance A. Smith, VP, Operations at UIS added: “This is our first lease for space in a Digital Realty Trust facility, but it will not be the last. Digital Realty Trust has been a great partner in this process, and its engineering and operations teams have provided value at every step in the process. That has tremendous value for us and for our customers. When customers engage UIS, they know they are not only getting the benefit of our expert team, but also Digital Realty Trust’s world-class team and its global resources.”

“Speed to market is critical for a company like UIS that is responding to strong demand for its datacenter services.  Our Turn-Key Datacenter™ facilities provide true move-in-ready space with the technical features, power and flexibility to quickly establish new datacenters,” said Chris Crosby, Senior Vice President of Digital Realty Trust. “Time is definitely money for these projects, and our Turn-Key Datacenter™ solution dramatically decreases the time needed to complete a datacenter expansion.”

Digital Realty Trust’s Turn-Key Datacenters™ 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 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™ is built using the company’s proprietary POD Architecture™ and uses metered power to ensure that clients pay only for the power that they use. Each Turn-Key facility is also managed via Digital Realty Trust’s Critical Facilities Management™ program to ensure the maximum uptime of mission critical applications.

About Unified Infrastructure Services

UIS offers a full suite of managed datacenter services to customers who require more services than a traditional hoster can provide, but who are not ready to surrender their entire budget to a large IT outsourcer. UIS has assembled a star team of datacenter experts, IT experts and industry veterans to support the datacenter needs of this under-served segment of the market. UIS’ full range of services include custom enterprise data suites; managed services such as co-location, mo-lo, managed hosting, hosted exchange, storage solutions and more; technology consulting services; and critical facilities services such as energy management and building management. For more information, visit www.unifiedis.com. Unified Infrastructure Services is a member of the Unified Group family of companies (www.ugroup-inc.com)

About Digital Realty Trust, Inc.

Digital Realty Trust, Inc. owns, acquires, redevelops, develops and manages technology-related real estate. The Company is focused on providing Turn-Key Datacenter™ and Powered Base Building™ 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 70 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 12.3 million rentable square feet, including 1.8 million square feet of space held for redevelopment, Digital Realty Trust's portfolio is located in 26 markets throughout North America and Europe. For additional information, please visit Digital Realty Trust's website at http://www.digitalrealtytrust.com.