变形和划伤是光盘难读的两大原因。CD-ROM对盘片的几何形状规则度要求很高,盘片一旦变形。在CD-ROM中高速旋转时就会产生很大的力矩,使光盘上下窜动,导致焦距无法对准而不能读盘,激光头还可能在盘片上划出一圈深深的划痕,甚至损坏激光头,这时CD-ROM中会发出很大的“吱吱”声,就必须立即按CD-ROM上的弹出键强制终止读盘。取 Deformation and scratches are two major reasons why CDs are hard to read. CD-ROM on the geometry of the platters demanding, once the deformation of the disc. CD-ROM in the high-speed rotation will have a lot of torque, the disc up and down, resulting in focal length can not be aligned and can not read the disc, the laser head may also draw a deep circle of scratches on the disc or even If the laser head is damaged, then a large “creak” sound will be emitted from the CD-ROM. You must immediately press the eject button on the CD-ROM to forcibly terminate the reading. take