磁盘引导扇区
引导扇区（Boot Sector）
磁盘的第一个扇区，总共512个字节（Byte），由MBR（Master Boot Record）、DPT（Disk Partition Table）和Boot Record ID三部分组成。
MBR－主引导记录，占用引导扇区的前446个字节（地址范围：0~0x1BD），用来存放系统主引导程序（主引导程序负责从活动分区装载并运行系统引导程序）。
DPT－磁盘分区表，占用引导扇区的64个字节（0x1BE～0x1FD），记录磁盘的基本分区信息，磁盘分区表分为四个分区项，每项16个字节，分别记录着四个主分区信息（因此最多可以有四个主分区）。
Boot Record ID－引导记录标记，占用引导扇区2个字节（0x1FE~0x1FF），对于合法的引导区，它等于0xaa55，这是判别引导区是否合法的标志。
2022年8月30日 21:01
Bangladesh Education Board DPE has conducted the class 8th grade of Junior School Certificate Exam and Junior Dakhil Certificate Exam on 1st to 15th November 2022 at all centers in division wise under Ministry of Primary and Mass Education (MOPME), and the class 8th grade terminal examination tests are successfully conducted for all eligible JSC/JDC students for the academic year of 2022. Junior Certificate Result Sylhet Board The Bangladesh government Minister of Secondary Education is going to announce the JSC Result 2022 in student wise for division students in education board wise, and the result documents will be submitted to the Prime Minister of the country after then the result with mark sheet will be announced to public to check the individual result.