+checks an exFAT filesystem and repairs the filesystem
+depending on the options passed. The following corruptions can be repaired, and see the option, '-s'.
+.IP -
+Boot sector has invalid parameters. If backup boot sector is valid, replace the boot sector with it.
+.IP -
+Cluster is marked as free but belonged to a file, or vise versa. The bitmap for the cluster is marked properly.
+.IP -
+File size is abnormally large considering the count of clusters. The size is changed.
+.IP -
+File size is abnormally small considering the count of clusters. The remaining clusters are deleted.
+.IP -
+File's cluster chain has an invalid cluster number. The number are changed to EOF, and the file size is also changed.
+.IP -
+File's cluster chain contains a loop. The loop is broken.
+.IP -
+Files share the same cluster. Cluster chains for files except one are broken.
+.IP -
+Start cluster number is invalid. The cluster number and file size are changed to 0.
+.IP -
+Checksum value of directory entry set is invalid. Directory entry set is deleted.
+.IP -
+Bad hash value of a file name. The hash value is changed properly.
+.IP -
+Fields of directory entry set have invalid values. Directory entry set is deleted.