本文讨论了硬盘、软盘、磁带装置及自动磁带库的发展趋势。这类磁外存设备一直在持续飞速地发展,虽面临着光盘的挑战,但尚不会被光盘取代其在计算机领域所占的重要地位。 This article discusses the trends in hard drives, floppy disks, tape devices, and tape libraries. This type of magnetic memory device has been continuously and rapidly evolving. Although it faces the challenge of a compact disc, it has not been replaced by a compact disc in its important position in the computer field.