Brief I ntroduction of C luster About clusters Cluster refers to the minimum disk space that can be allocated to save files. When creating a very small file, such as one byte, it does not occupy only one byte of space on the disk, but the entire "cluster". Cluster is a logical concept used by the operating system, not the physical characteristics of the disk. In order to better manage the disk space and read data from the hard disk more efficiently, the operating system stipulates that only one file can be placed in a cluster, so the space occupied by the file can only be an integer multiple of the cluster. If the actual size of the file is smaller than a cluster, it also occupies a cluster of space. If the actual size of the file is larger than one cluster, according to the logical calculation, the file will occupy two clusters. Even if the file has only 0 bytes, it is not allowed for two files or more than two files to share a cluster, otherwise it will cause data con