1. A data processing method for a memory system of a computer, the method comprising: searching a master catalog to determine volume location information of a file, wherein the volume location information of the file comprises locations in two or more volumes of a plurality of volumes of the memory system; searching a respective table of contents for each of the two or more volumes in which the file is located to locate a plurality of extents of the file based on the file location information from the master catalog; retrieving data attributes for each of the extents of the file from the searched tables of contents; formatting the data attributes, the formatting comprising interpreting the data attributes using one or more interpretation rules, and converting the data attributes to a readable format based on the interpreting; and generating an output including the formatted data attributes.