NEW YORK (Standard&Poor's) July 29, 2013--Standard&Poor's Ratings Services said today its ratings on Boston-based information storage company Iron Mountain Inc. are unchanged following the company's proposed amendment to upsize its senior secured revolving credit facility to $1.5 billion from $725 million. The unchanged ratings include the 'BB-' corporate credit rating, the 'BB+' issue-level rating on the existing senior secured credit facilities, and the 'B+' issue-level rating on all unsecured debt. The recovery rating on the revolver is '1', indicating our expectation of very high (90% to 100%) recovery for secured lenders in the event of a payment default. The recovery rating on the existing unsecured debt remains '5' (10% to 30% recovery expectation). The company will