These pages provide basic information about how hard disk drives work.
Overview Of Logical Block Addressing
LBA or Logical Block Addressing rearranges the apparent geometry of a hard disk. LBA is a way of
addressing hard drives by assigning numbers sequentially to each sector on a hard drive. The only way LBA
can be efficient is if it is used by the operating system and applications on the software side of the BIOS.
LBA can be a more efficient method to handle files on drives larger then 528 MB but LBA does not
necessarily improve system performance.
SCSI drives always employ LBA, and it is just recently that IDE drives started to use LBA. To implement
LBA, both the hard drive and the BIOS, must be aware that the hard drive is in LBA mode and the drive itself
must support logical block addressing. On most hard drives, the use of LBA is not required as it; what is
required to support a large hard drive is a translating BIOS.
Most drives that support LBA do not require that LBA is used and LBA addressing is not normally required
in order for a BIOS to support large drives. What is required to support large drives is a translating BIOS.