表面涂有一层记录层并以高速旋转的磁鼓或磁盘,可以用作大多数数据处理设备的存储器。它们具有可靠、经济等优点,故获得广泛的应用。本文将美国生产的磁鼓及磁盘作一简要的介绍。最近由于工艺上的进步,出现了浮动磁头。只要旋转的磁鼓或磁盘的表面线速度足够,也就是说其上附着的空气薄膜的浮力足够,浮动磁头在外力的作用下,能紧靠记录层的表 A drum or disk coated with a recording layer and rotating at high speed can be used as a memory for most data processing devices. They have the advantages of reliability, economy, etc., and are therefore widely used. This article will be made in the United States drum and disk for a brief introduction. Recently due to technological advances, there has been a floating head. As long as the surface speed of the rotating drum or disk is sufficient, that is to say the buoyancy of the air film attached thereto is sufficient, the floating head can abut against the surface of the recording layer under the external force