Attach one or more dasds direct access storage device 加上一个或多个直接存取设备dasd
You can store data on secondary storage devices , such as a direct access storage device ( dasd ) or magnetic tape volume 你可以在辅助存储设备上存储数据,例如直接存取存储设备( dasd )或者磁带。
百科解释
In mainframe computers and some minicomputers, a direct access storage device, or DASD (), is any secondary storage device which has relatively low access time relative to its capacity.