EXHIBIT 12 IRON MOUNTAIN INCORPORATED STATEMENT OF THE CALCULATION OF RATIO OF EARNINGS TO FIXED CHARGES (Dollars in thousands) Six Months Ended June 30, 1996 1997 1998 1999 2000 2001 -------- -------- -------- -------- --------- ----------------- Earnings: Income (loss) from continuing operations before provision (benefit) for Income taxes & Minority Interest $ 1,792 $ (4,601) $ 3,391 $ 9,841 $ (18,032) $ 4,517 Add: Fixed charges 21,939 37,489 61,169 73,957 154,975 89,153 -------- -------- -------- -------- --------- ----------------- $ 23,731 $ 32,888 $ 64,560 $ 83,798 $ 136,943 93,670 ======== ======== ======== ======== ========= ================= Fixed Charges: Interest Expense $ 14,901 $ 27,712 $ 45,673 $ 34,425 $ 117,975 68,030 Interest Portion of rent expense 7,038 9,777 15,496 19,532 37,000 21,123 -------- -------- -------- -------- --------- ----------------- $ 21,939 $ 37,489 $ 61,169 $ 73,957 $ 154,975 89,153 ======== ======== ======== ======== ========= ================= Ratio of earnings to fixed charges 1.1x 0.9x(1) 1.1x 1.1x 0.9x(1) 1.1x (1) We reported a loss from continuing operations before provision (benefit) for income taxes and minority interest for the years ended December 31, 1997 and December 30, 2000, the Company would have needed to generate additional income from operations before provision for income taxes and minority interest of $4,601 and $18,032 to cover its fixed charges of $37,489 and $154,975, respectively.