Cluster allocation method and system for multi-host FAT file system

The invention discloses a cluster allocation method and system oriented to a multi-host FAT file system. The method is applied to an FAT sharing system oriented to the multi-host FAT file system, andthe FAT sharing system comprises a host end and a storage module end independent of the host end, wherein the storage module end is in communication connection with the host end, and an FAT table is stored in the storage module end. The method comprises the following steps: pre-allocating non-overlapping cluster domains to each host in a cluster of the FAT; detecting a cluster pool application request sent by the host end; according to the cluster pool application request and the cluster domain allocated to the host end sending the cluster pool application request, performing cluster pool allocation on the host end sending the cluster pool application request. The technical scheme of the invention aims to solve the problem of low data writing efficiency caused by frequent interaction of the FAT file system under m