一、概述数字磁表面存贮装置除作为大容量存贮器在地面信息处理系统中占有重要地位外,在机载、星载的数据存贮系统中也得到日益广泛的应用。容量、数据传输率、可靠性及成本等主要性能指标均与位密度直接相关。计测用的数字磁带记录仪位密度指标总是高于计算机的磁记录外存。目前,前者的 I. Overview Digital magnetic surface storage devices, as a large-capacity memory, occupy an important place in the ground information processing system. They are also widely used in airborne and on-board data storage systems. Capacity, data transfer rate, reliability and cost and other key performance indicators are directly related to the bit density. The measured digital tape recorder bit density index is always higher than the computer’s magnetic recording memory. At present, the former