Prefetching　coordinate　algorithm　can　effectively　improve　the　efficiency　of　a　storage　system;　however,　its　shortcomings　limit　performance　increase　of　the　storage　system.　The　algorithm　cannot　be　used　in　heterogeneous　storage　systems　for　these　defects.　This　paper　analyzes　the　two　shortcomings　and　proposes　an　improved　method.　The　new　algorithm　adds　three　counters　to　make　more　detailed　analysis　of　the　parameters　of　prefetching　coordinator.　Then,　it　can　accurately　adjust　the　aggressiveness　of　the　prefetching　algorithm.　Result　shows　that　the　improved　prefetching　algorithm　IHPC　can　not　only　reduce　the　miss　rate　of　the　server　in　random　requests,　but　also　be　used　in　the　heterogeneous　system　architecture.　The　performance　of　the　storage　system　depends　only　on　the　performance　of　the　prefetching　algorithm　in　server-side.