硬盘驱动器是微型计算机的主要外部存储设备 ,用户的大多数程序和数据都存储在硬盘上 ,这些程序和数据的价值常常远远超过硬盘本身的价值 ,一旦硬盘出现故障 ,除了要维修硬盘外 ,更重要的是抢救硬盘上的数据。硬盘的故障可分为两大类 ,一类是硬盘的硬件发生故障 ,称为硬故障 ; Hard disk drives are the main external storage devices for microcomputers. Most of the user’s programs and data are stored on the hard disk. The value of these programs and data often far exceeds the value of the hard disk itself. Once the hard disk fails, in addition to repairing the hard disk, More important is to rescue the data on the hard disk. Hard disk failure can be divided into two categories, one is the hard disk hardware failure, known as hard failure;