Exhibit 12.1

Digital Realty Trust, Inc. and Subsidiaries

Statement of Computation of Ratios (1)

(in thousands, except ratios)



|                                                                  |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|----------------------------------------------------------------- |  | ------------------------------- | ------- |  | ----------------------- | - | ------- | ---- |  | - | ------- | - |  | ---- | ------- | - | ---- | - | ------- | --- |  | - | ------ | 
|                                                                  |  | Nine months ended September 30, |         |  | Year ended December 31, |  
|                                                                  |  | 2010                            |         |  | 2009                    |   |         | 2009 |  |   | 2008    |   |  | 2007 |         |   | 2006 |  
|Income from continuing operations before noncontrolling interests |  | $                               | 69,114  |  |                         | $ | 66,337  |      |  | $ | 91,234  |   |  | $    | 67,918  |   |      | $ | 22,546  |     |  | $ | 24,890 | 
|                                                                  |  |                                 |         |  |                         |  
|Interest expense                                                  |  |                                 | 100,801 |  |                         |   | 63,991  |      |  |   | 88,442  |   |  |      | 63,621  |   |      |   | 67,054  |     |  |   | 50,598 | 
|Interest within rental expense                                    |  |                                 | 1,921   |  |                         |   | 2,174   |      |  |   | 2,633   |   |  |      | 2,619   |   |      |   | 1,971   |     |  |   | 680    | 
|Noncontrolling interests in consolidated joint ventures           |  |                                 | 29      |  |                         |   | (614    | )    |  |   | (140    | ) |  |      | (335    | ) |      |   |        |     |  |   |       | 
|                                                                  |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|Earnings available to cover fixed charges                         |  | $                               | 171,865 |  |                         | $ | 131,888 |      |  | $ | 182,169 |   |  | $    | 133,823 |   |      | $ | 91,571  |     |  | $ | 76,168 | 
|                                                                  |  |                                 |         |  |                         |  
|Fixed charges:                                                    |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|Interest expense                                                  |  | $                               | 100,801 |  |                         | $ | 63,991  |      |  | $ | 88,442  |   |  | $    | 63,621  |   |      | $ | 67,054  |     |  | $ | 50,598 | 
|Interest within rental expense(2)                                 |  |                                 | 1,921   |  |                         |   | 2,174   |      |  |   | 2,633   |   |  |      | 2,619   |   |      |   | 1,971   |     |  |   | 680    | 
|Capitalized interest                                              |  |                                 | 7,141   |  |                         |   | 7,246   |      |  |   | 9,196   |   |  |      | 18,351  |   |      |   | 12,264  |     |  |   | 4,028  | 
|                                                                  |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|                                                                  |  |                                 | 109,863 |  |                         |   | 73,411  |      |  |   | 100,271 |   |  |      | 84,591  |   |      |   | 81,289  |     |  |   | 55,306 | 
|                                                                  |  |                                 |         |  |                         |  
|Preferred stock dividends                                         |  |                                 | 29,396  |  |                         |   | 30,303  |      |  |   | 40,404  |   |  |      | 38,564  |   |      |   | 19,330  |     |  |   | 13,780 | 
|                                                                  |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|Fixed charges and preferred stock dividends                       |  | $                               | 139,259 |  |                         | $ | 103,714 |      |  | $ | 140,675 |   |  | $    | 123,155 |   |      | $ | 100,619 |     |  | $ | 69,086 | 
|                                                                  |  |                                 |         |  |                         |  
|Ratio of earnings to fixed charges                                |  |                                 | 1.56    |  |                         |   | 1.80    |      |  |   | 1.82    |   |  |      | 1.58    |   |      |   | 1.13    |     |  |   | 1.38   | 
|                                                                  |  |                                 |         |  |                         |  
|Ratio of earnings to fixed charges and preferred stock dividends  |  |                                 | 1.23    |  |                         |   | 1.27    |      |  |   | 1.29    |   |  |      | 1.09    |   |      |   |        | (3) |  |   | 1.10   | 
|                                                                  |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 



|(1) | All numbers presented in this exhibit exclude 7979 East Tufts Avenue (sold July 2006), 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)



|                                                                    |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|------------------------------------------------------------------- |  | ------------------------------- | ------- |  | ----------------------- | - | ------- | ---- |  | - | ------- | - |  | ---- | ------- | - | ---- | - | ------- | --- |  | - | ------ | 
|                                                                    |  | Nine months ended September 30, |         |  | Year ended December 31, |  
|                                                                    |  | 2010                            |         |  | 2009                    |   |         | 2009 |  |   | 2008    |   |  | 2007 |         |   | 2006 |  
|Income from continuing operations before noncontrolling interests   |  | $                               | 69,114  |  |                         | $ | 66,337  |      |  | $ | 91,234  |   |  | $    | 67,918  |   |      | $ | 22,546  |     |  | $ | 24,890 | 
|                                                                    |  |                                 |         |  |                         |  
|Interest expense                                                    |  |                                 | 100,801 |  |                         |   | 63,991  |      |  |   | 88,442  |   |  |      | 63,621  |   |      |   | 67,054  |     |  |   | 50,598 | 
|Interest within rental expense                                      |  |                                 | 1,921   |  |                         |   | 2,174   |      |  |   | 2,633   |   |  |      | 2,619   |   |      |   | 1,971   |     |  |   | 680    | 
|Noncontrolling interests in consolidated joint ventures             |  |                                 | 29      |  |                         |   | (614    | )    |  |   | (140    | ) |  |      | (335    | ) |      |   |        |     |  |   |       | 
|                                                                    |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|Earnings available to cover fixed charges                           |  | $                               | 171,865 |  |                         | $ | 131,888 |      |  | $ | 182,169 |   |  | $    | 133,823 |   |      | $ | 91,571  |     |  | $ | 76,168 | 
|                                                                    |  |                                 |         |  |                         |  
|Fixed charges:                                                      |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|Interest expense                                                    |  | $                               | 100,801 |  |                         | $ | 63,991  |      |  | $ | 88,442  |   |  | $    | 63,621  |   |      | $ | 67,054  |     |  | $ | 50,598 | 
|Interest within rental expense(2)                                   |  |                                 | 1,921   |  |                         |   | 2,174   |      |  |   | 2,633   |   |  |      | 2,619   |   |      |   | 1,971   |     |  |   | 680    | 
|Capitalized interest                                                |  |                                 | 7,141   |  |                         |   | 7,246   |      |  |   | 9,196   |   |  |      | 18,351  |   |      |   | 12,264  |     |  |   | 4,028  | 
|                                                                    |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|                                                                    |  |                                 | 109,863 |  |                         |   | 73,411  |      |  |   | 100,271 |   |  |      | 84,591  |   |      |   | 81,289  |     |  |   | 55,306 | 
|                                                                    |  |                                 |         |  |                         |  
|Preferred unit distributions                                        |  |                                 | 29,396  |  |                         |   | 30,303  |      |  |   | 40,404  |   |  |      | 38,564  |   |      |   | 19,330  |     |  |   | 13,780 | 
|                                                                    |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 
|Fixed charges and preferred unit distributions                      |  | $                               | 139,259 |  |                         | $ | 103,714 |      |  | $ | 140,675 |   |  | $    | 123,155 |   |      | $ | 100,619 |     |  | $ | 69,086 | 
|                                                                    |  |                                 |         |  |                         |  
|Ratio of earnings to fixed charges                                  |  |                                 | 1.56    |  |                         |   | 1.80    |      |  |   | 1.82    |   |  |      | 1.58    |   |      |   | 1.13    |     |  |   | 1.38   | 
|                                                                    |  |                                 |         |  |                         |  
|Ratio of earnings to fixed charges and preferred unit distributions |  |                                 | 1.23    |  |                         |   | 1.27    |      |  |   | 1.29    |   |  |      | 1.09    |   |      |   |        | (3) |  |   | 1.10   | 
|                                                                    |  |                                 |         |  |                         |   |         |      |  |   |         |   |  |      |         |   |      |   |         |     |  |   |        | 



|(1) | All numbers presented in this exhibit exclude 7979 East Tufts Avenue (sold July 2006), 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.
|--- | ------------------------------------------------------------------------------------------------------------------------------