大容量磁盘存贮器在当前计算机系统中所占的重要地位是众所周知的。庞大的操作系统时依赖着它。一般的计算机系统结构最少需用2台磁盘存贮器,其一存放操作系统,其二做工作盘。当使用虚存方式工作时,还必须再增加一台磁盘作虚存的背景存贮器。因此,一个标准系统结构总带着4台磁盘,其中有一台做为工作盘的扩充和备份。 The importance of mass disk storage in current computer systems is well known. It depends on a huge operating system. The general computer system structure requires a minimum of 2 disk storage, one of the operating system, the other to do the work of the disk. When using the virtual memory approach, you must also add a disk as the background memory for the memory. Therefore, a standard system structure with a total of four disk, one of them as a working disk expansion and backup.