The general reason for mass production U disk error

Many friends like to use the U disk to start mass production into CD-ROM format, but in the process of mass production will always have one or the other problem, now talk about the most Two mistakes that are easy to make. First, the U disk chip model is wrong. Second, the computer USB socket current and voltage are insufficient. The first reason everyone understands, the second reason we don't understand, let's take a closer look. At the beginning, during the test on 14 computers, we found a strange phenomenon, the same U disk and production software (production tool software), some computers can be successful, some can not be successful, and even change After using its chip-specific mass production software, even the correct U disk capacity can not be recognized (for example, 4GB is recognized as 2GB, or 4GB is recognized as 8GB), so we should pay more attention to this.