OSDev.org

slacker wrote: whats the difference between logical and physical sectors? also when i tried writing the bytes 0x55 and 0xAA in a loop to the first sector i still get the bios error message which means i am not writing the bootsector(sector 1) correctly right?

The physical sectors are the real sector on the disc. So physical sector 0 is the very first sector on the disc.

Logical sectors are the sectors within a partition. So logical sector 0 is the first sector on the partition (but not the first sector on the disc).

Any clearer?