Exhibit 12.1

Digital Realty Trust, Inc. and Subsidiaries

Statement of Computation of
Ratios (1)

(in thousands, except ratios)



|                                                                  |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|----------------------------------------------------------------- |  | ---------------------------- | ------ |  | ----------------------- | - | ------ | ---- |  | - | ------- |  |  | ---- | ------- | - | ---- | - | ------- | - |  | - | ------- | ---
|                                                                  |  | Three Months Ended March 31, |        |  | Year Ended December 31, |  
|                                                                  |  | 2011                         |        |  | 2010                    |   |        | 2010 |  |   | 2009    |  |  | 2008 |         |   | 2007 |  
|                                                                  |  |                              |        |  |                         |  
|Income from continuing operations before noncontrolling interests |  | $                            | 39,012 |  |                         | $ | 25,586 |      |  | $ | 105,412 |  |  | $    | 91,234  |   |      | $ | 67,918  |   |  | $ | 22,546  |    
|                                                                  |  |                              |        |  |                         |  
|Interest expense                                                  |  |                              | 36,082 |  |                         |   | 30,902 |      |  |   | 137,384 |  |  |      | 88,442  |   |      |   | 63,621  |   |  |   | 67,054  |    
|Interest within rental expense                                    |  |                              | 700    |  |                         |   | 621    |      |  |   | 2,604   |  |  |      | 2,633   |   |      |   | 2,619   |   |  |   | 1,971   |    
|Noncontrolling interests in consolidated joint ventures           |  |                              | 142    |  |                         |   | 232    |      |  |   | 288     |  |  |      | (140    | ) |      |   | (335    | ) |  |   |        |    
|                                                                  |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|Earnings available to cover fixed charges                         |  | $                            | 75,936 |  |                         | $ | 57,341 |      |  | $ | 245,688 |  |  | $    | 182,169 |   |      | $ | 133,823 |   |  | $ | 91,571  |    
|                                                                  |  |                              |        |  |                         |  
|Fixed charges:                                                    |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|Interest expense                                                  |  |                              | 36,082 |  |                         |   | 30,902 |      |  | $ | 137,384 |  |  | $    | 88,442  |   |      | $ | 63,621  |   |  | $ | 67,054  |    
|Interest within rental expense(2)                                 |  |                              | 700    |  |                         |   | 621    |      |  |   | 2,604   |  |  |      | 2,633   |   |      |   | 2,619   |   |  |   | 1,971   |    
|Capitalized interest                                              |  |                              | 4,666  |  |                         |   | 1,907  |      |  |   | 10,241  |  |  |      | 9,196   |   |      |   | 18,351  |   |  |   | 12,264  |    
|                                                                  |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|                                                                  |  |                              | 41,448 |  |                         |   | 33,430 |      |  |   | 150,229 |  |  |      | 100,271 |   |      |   | 84,591  |   |  |   | 81,289  |    
|                                                                  |  |                              |        |  |                         |  
|Preferred stock dividends                                         |  |                              | 6,522  |  |                         |   | 10,101 |      |  |   | 37,004  |  |  |      | 40,404  |   |      |   | 38,564  |   |  |   | 19,330  |    
|                                                                  |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|Fixed charges and preferred stock dividends                       |  | $                            | 47,970 |  |                         | $ | 43,531 |      |  | $ | 187,233 |  |  | $    | 140,675 |   |      | $ | 123,155 |   |  | $ | 100,619 |    
|                                                                  |  |                              |        |  |                         |  
|Ratio of earnings to fixed charges                                |  |                              | 1.83   |  |                         |   | 1.72   |      |  |   | 1.64    |  |  |      | 1.82    |   |      |   | 1.58    |   |  |   | 1.13    |    
|                                                                  |  |                              |        |  |                         |  
|Ratio of earnings to fixed charges and preferred stock dividends  |  |                              | 1.58   |  |                         |   | 1.32   |      |  |   | 1.31    |  |  |      | 1.29    |   |      |   | 1.09    |   |  |   |        | (3)
|                                                                  |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    





|(1) | All numbers presented in this exhibit exclude 100 Technology Center Drive (sold in March 2007) and 4055 Valley View Lane (sold in March 2007).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------

|(3) | For the year ended December 31, 2007, earnings were insufficient to cover fixed charges and preferred dividends by $9,048.
|--- | --------------------------------------------------------------------------------------------------------------------------

Digital Realty Trust, L.P. and Subsidiaries

Statement of Computation of Ratios (1)

(in thousands, except ratios)



|                                                                    |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|------------------------------------------------------------------- |  | ---------------------------- | ------ |  | ----------------------- | - | ------ | ---- |  | - | ------- |  |  | ---- | ------- | - | ---- | - | ------- | - |  | - | ------- | ---
|                                                                    |  | Three Months Ended March 31, |        |  | Year Ended December 31, |  
|                                                                    |  | 2011                         |        |  | 2010                    |   |        | 2010 |  |   | 2009    |  |  | 2008 |         |   | 2007 |  
|                                                                    |  |                              |        |  |                         |  
|Income from continuing operations before noncontrolling interests   |  | $                            | 39,012 |  |                         | $ | 25,586 |      |  | $ | 105,412 |  |  | $    | 91,234  |   |      | $ | 67,918  |   |  | $ | 22,546  |    
|                                                                    |  |                              |        |  |                         |  
|Interest expense                                                    |  |                              | 36,082 |  |                         |   | 30,902 |      |  |   | 137,384 |  |  |      | 88,442  |   |      |   | 63,621  |   |  |   | 67,054  |    
|Interest within rental expense                                      |  |                              | 700    |  |                         |   | 621    |      |  |   | 2,604   |  |  |      | 2,633   |   |      |   | 2,619   |   |  |   | 1,971   |    
|Noncontrolling interests in consolidated joint ventures             |  |                              | 142    |  |                         |   | 232    |      |  |   | 288     |  |  |      | (140    | ) |      |   | (335    | ) |  |   |        |    
|                                                                    |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|Earnings available to cover fixed charges                           |  | $                            | 75,936 |  |                         | $ | 57,341 |      |  | $ | 245,688 |  |  | $    | 182,169 |   |      | $ | 133,823 |   |  | $ | 91,571  |    
|                                                                    |  |                              |        |  |                         |  
|Fixed charges:                                                      |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|Interest expense                                                    |  |                              | 36,082 |  |                         |   | 30,902 |      |  | $ | 137,384 |  |  | $    | 88,442  |   |      | $ | 63,621  |   |  | $ | 67,054  |    
|Interest within rental expense(2)                                   |  |                              | 700    |  |                         |   | 621    |      |  |   | 2,604   |  |  |      | 2,633   |   |      |   | 2,619   |   |  |   | 1,971   |    
|Capitalized interest                                                |  |                              | 4,666  |  |                         |   | 1,907  |      |  |   | 10,241  |  |  |      | 9,196   |   |      |   | 18,351  |   |  |   | 12,264  |    
|                                                                    |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|                                                                    |  |                              | 41,448 |  |                         |   | 33,430 |      |  |   | 150,229 |  |  |      | 100,271 |   |      |   | 84,591  |   |  |   | 81,289  |    
|                                                                    |  |                              |        |  |                         |  
|Preferred unit distributions                                        |  |                              | 6,522  |  |                         |   | 10,101 |      |  |   | 37,004  |  |  |      | 40,404  |   |      |   | 38,564  |   |  |   | 19,330  |    
|                                                                    |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    
|                                                                    |  |                              |        |  |                         |  
|Fixed charges and preferred unit distributions                      |  | $                            | 47,970 |  |                         | $ | 43,531 |      |  | $ | 187,233 |  |  | $    | 140,675 |   |      | $ | 123,155 |   |  | $ | 100,619 |    
|                                                                    |  |                              |        |  |                         |  
|Ratio of earnings to fixed charges                                  |  |                              | 1.83   |  |                         |   | 1.72   |      |  |   | 1.64    |  |  |      | 1.82    |   |      |   | 1.58    |   |  |   | 1.13    |    
|                                                                    |  |                              |        |  |                         |  
|Ratio of earnings to fixed charges and preferred unit distributions |  |                              | 1.58   |  |                         |   | 1.32   |      |  |   | 1.31    |  |  |      | 1.29    |   |      |   | 1.09    |   |  |   |        | (3)
|                                                                    |  |                              |        |  |                         |   |        |      |  |   |         |  |  |      |         |   |      |   |         |   |  |   |         |    



|(1) | All numbers presented in this exhibit exclude 100 Technology Center Drive (sold in March 2007) and 4055 Valley View Lane (sold in March 2007).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------

|(3) | For the year ended December 31, 2007, earnings were insufficient to cover fixed charges and preferred distributions by $9,048.
|--- | ------------------------------------------------------------------------------------------------------------------------------