Yes 1024, the maximum number of heads is 16, the maximum number of sectors is 63, and the number of bytes per sector is 5 12, so the maximum supported hard disk capacity is 512x63x16x1023.
In this mode, no matter how large the actual physical capacity of the hard disk is, only 528M can be used.
LBA (logical block addressing) logical block addressing mode. The managed hard disk space can reach 8.4GB. In LBA mode, cylinder, head and sector are set.
Parameter is not the physical parameter of the actual hard disk. When accessing the hard disk, the IDE controller converts the logical address determined by parameters such as cylinder, head and sector into the actual hard disk.
The physical address of. In LBA mode, the maximum number of magnetic heads that can be set is 255, and other parameters are the same as those in normal mode, so the available hard disk capacity can be calculated, as shown below:
512x63x255x1025 = 8.4gb. However, now the BIOS of the new motherboard has been extended to INT 13, which enables LBA to support hard disks above 100GB.
When the cylinder of the hard disk exceeds 1024, the large hard disk mode is adopted, which is not supported by LBA. The method used in large mode is to divide the number of cylinders by 2 and then by the number of magnetic heads.
Multiplied by 2, the total capacity of the result remains the same.
Among the three hard disk modes, LBA mode is the most widely used one now. seven