Exhibit 12.1

Digital Realty Trust, Inc.

Statement of Computation of Ratios (1)

	Three months ended March 31,					Year ended December 31,
	2009		2008			2008			2007			2006		2005
Income from continuing operations before noncontrolling interests	$	21,189	$	10,816		$	67,918		$	22,546		$	24,890	$	24,460
Interest expense		18,937		15,202			63,621			67,054			50,598		35,381
Interest within rental expense		726		621			2,619			1,971			680		147
Noncontrolling interests in consolidated joint venture		—		—			(335	)		—			—		—
Earnings available to cover fixed charges	$	40,852	$	26,639		$	133,823		$	91,571		$	76,168	$	59,988
Fixed charges:
Interest expense	$	18,937	$	15,202		$	63,621		$	67,054		$	50,598	$	35,381
Interest within rental expense (2)		726		621			2,619			1,971			680		147
Capitalized interest		3,072		4,708			18,351			12,264			4,028		279
		22,735		20,531			84,591			81,289			55,306		35,807
Preferred stock dividends		10,101		8,258			38,564			19,330			13,780		10,014
Fixed charges and preferred stock dividends	$	32,836	$	28,789		$	123,155		$	100,619		$	69,086	$	45,821
Ratio of earnings to fixed charges		1.80		1.30			1.58			1.13			1.38		1.68
Ratio of earnings to fixed charges and preferred stock dividends		1.24		—	(3 )		1.09			—	(4)		1.10		1.31

(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 three months ended March 31, 2008, earnings were insufficient to cover fixed charges and preferred dividends by $2,150.

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