Unsettled conditions in the Near East and the Greek fight for independence had resulted in some excesses against third parties, notably American flag merchantmen.

For the next three weeks, Warren cruised between Cape Matapan and Carabusa, touching occasionally to contact outward-bound American merchantmen.

Warren's men cut away the masts of the erstwhile pirate ship and stripped them of their sails, leaving the rigging submerged in the waters offshore.

Near the south end of the town of Andros, Warren's men brought out one "piratical craft" and burned another in a small bay nearby.

On 19 October 1843, Warren sailed for service with the Pacific Squadron and remained on the western coast of the North American continent for the remainder of her naval career.

During the war with Mexico, Warren acted as a guardship at Monterey, California and eventually moved to San Francisco, for duty as a stores and receiving ship.

On 13 November 1846, the former sloop-of-war's launch, in charge of Acting Master William H. Montgomery, departed the ship with $900.00 to pay bills accrued by the Navy for supplies, bound for Sutter's Fort, up the Sacramento River.

On 18 December, the search party – having combed the river and inlets as far as Fort Sacramento—returned and reported finding no sign of the launch or of the crew.

The men divided the money and split up, some returning overland across the North American continent to the east; others remained in California to pan for "washing gold."

However, they do show that orders were issued that valid discharges were to be shown by all naval personnel returning overland to prove that they were not deserters.

Her eventual fate is unrecorded, although records indicate that the erstwhile sloop-of-war was used as a coal hulk by the Pacific Mail Steamship Company as late as 1874.