Patent ID: 7844606

Claim:
At least one computer-readable storage medium having instructions recorded thereon which, when executed, perform a method of managing a file system filter, the method comprising: identifying an integer altitude value of a minifilter; mapping an altitude, defined by the integer altitude value, of the minifilter to one of a plurality of legacy filter order groups, the mapping comprising: determining an altitude range associated with at least a portion of the legacy filter order groups, determining whether any altitude range of a legacy filter order group encompasses the integer altitude value of the minifilter; if an altitude range of a legacy filter order group encompasses the integer altitude value of the minifilter, then inserting the minifilter into the legacy filter order group; and if no altitude range of a legacy filter order group encompasses the integer altitude value of the minifilter, then creating a new filter order group and inserting the minifilter into the new filter order group.