Online repair method aimed at file system

The invention relates to an online repair method aimed at a file system, and belongs to the technical field of computer storage. The online repair method comprises the following steps: scanning the damage of a storage volume associated with the file system, carrying out real-time error correction, and simultaneously keeping the storage volume online, so that the file system still can respond to an IO request; during the scanning process, classifying encountering errors, and adopting a corresponding repair scheme; during the repair process, establishing repair time for specific errors, and giving out a repair rate of progress; if the repair is in failure, clearing off the data; Establishing a manager device above the storage volume, and taking the last part of storage space of the storage volume as a logger device, wherein the manager device is in charge of management and maintenance; during the period of error amending, intercepting and processing the IO request issued by the file system by the manager device