磁盘存贮器是电子计算机外部存贮器的重要设备之一,它与磁带、磁鼓一样,都是属于磁记录式外存贮器,用于计算机数据、程序及中间结果的存贮。存贮在磁盘上的这种信息的安全、可靠程度,直接影响着电子计算机的推广应用。情报检索、企业管理等领域,对这点要求尤为突出。以医院为例,床位管理,药品管理等,它每天每时都在保留着全院、各病区伤病员进出信息,药品的进出库信息,一旦存贮在磁盘上的这种信息遭到破坏,造成的损失不堪 Disk storage is one of the most important external storage devices for electronic computers. Like magnetic tapes and magnetic drums, magnetic disk storage belongs to magnetic recording external storage for the storage of computer data, programs and intermediate results. The safety and reliability of such information stored on disk directly affect the popularization and application of electronic computers. Intelligence retrieval, business management and other fields, this requirement is particularly prominent. Taking hospital as an example, bed management, drug administration, etc., it keeps the whole hospital every day and every day, the wards of wards come in and out of the information, drugs out of the library information, once stored in the disk of this information was To damage, the damage caused by the unbearable