1. A computer-implemented method for finding lost objects in a file system, the file system having a namespace, the computer comprising a computer processor, a computer memory operatively coupled to the computer processor, the computer memory having disposed within it computer program instructions that execute steps of the method, the method comprising: creating a list of all objects in the file system; identifying a portion of the namespace to compare with the list; comparing the portion of the namespace to the list; deleting from the list entries for objects represented in the portion of the namespace; and identifying objects unlinked while in use during execution of the method and deleting the identified objects unlinked while in use from the list.