1. There are more sectors on today's disks and, therefore, a greater chance of an uncorrectable error. 今天的磁盘上有更多的扇区，因而出现无法纠正错误的机会就更多。
2. If there is a rubber rollers, wear, deformation to produce and train rounds, if uncorrectable should get rid of matozoa, yenidan cast. 如果是橡胶辊体存在磨损、变形的，可进行加工车圆，若无法修正的应去除胶体后，重新进行铸制。
3. While disk capacities double every 12 to 18 months, uncorrectable read/write error rates haven't improved, nor has the probability of an uncorrectable error occurring on a disk read decreased. 磁盘容量每12至18个月就翻一番，但无法纠正的读/写错误率没有得到改进，而且发生在磁盘读时的无法纠正的错误概率也没有降低。
