读取磁盘扇区的源代码，让客户更容易的掌握分区技能,更方便大家了解分区的实质-disk sector read the source code to allow customers to more easily master the skills through more convenient for us to know the real zoning

This code is to read and write in a sector at the harddisk. This program is to manage in a sector at the harddisk.