MBR (master boot record) master boot Record analysis

[Email protected]:/home/chen# fdisk-l/dev/Sda1disk/DEV/SDA1:254MB,254803968bytes255Heads theSectors/track, -Cylinders, Total497664sectorsunits= Sectors of1* += +bytessector size (logical/physical): +Bytes/ +Bytesi/o Size (minimum/optimal): +Bytes/ +bytesdisk Identifier:0x00000000Disk/DEV/SDA1 doesn't contain a valid partition table

[Email protected]:/home/chen# fdisk-l/dev/Sda5disk/DEV/SDA5:21.2GB,21216886784bytes255Heads theSectors/track,2579Cylinders, Total41439232sectorsunits= Sectors of1* += +bytessector size (logical/physical): +Bytes/ +Bytesi/o Size (minimum/optimal): +Bytes/ +bytesdisk Identifier:0x00000000Disk/dev/sda5 doesn't contain a valid partition table

Storage byte bit	Content and Meaning
No. 0 Byte	The boot flag. A value of 80H indicates the active partition, and a value of 00H indicates an inactive partition.
First byte	The starting magnetic number, sector code, and cylinder number of this partition. Where: Magnetic number one--1th byte;
	Sector code-2nd byte low 6 bits;
	Cylinder number--2nd byte high 2 bit + 3rd byte 8 bit.
4th byte	The partition type character. 00h--indicates that the partition is unused (that is, not specified);
	06h--fat16 basic partition;
	0bh--fat32 basic partition;
	05h--extended partition;
	07H--NTFS partition;
	0fh--(LBA mode) extended partition (83H for Linux partitions, etc.).
Section 5,6,7 bytes	The end of this section of the magnetic number, sector code, cylinder number. Where: Magnetic Number one--5th byte;
	Sector code-6th byte low 6 bits;
	Cylinder number-The 6th byte high 2 bits + 7th byte.
Section 8,9,10,11 bytes	The number of sectors that have been used before this partition.
Section 12,13,14,15 bytes	The total number of sectors in this partition.

Note: In the "Sector in partition 1=497664" corresponds to "00 98 07 00", check the data, more than 1 bytes, the actual should correspond to "00 07 98 00" (like mirrored a bit)

MBR (master boot record) master boot Record analysis