sector numbering on floppy and hard drives?

[Fred Cisin]

On Sat, 10 Oct 2009, Andrew Lynch wrote:
> Hi!  Why does sector numbering start with physical Sector 1 on floppy and
> hard disks?
> Cylinders and Heads begin at 0 but sectors start at 1.  What happened to
> Sector 0?
> I am referring to physical address not LBA.
> I am just wondering.  Thanks and have a nice day!

Track numbering goes bask to the designers of the disk controller.

Sector numbering, on the other hand, is a creation of the systems
programmers who design that particular disk format.

SOME sector numberings start with 0.
SOME sector numberings start with 1.
SOME sector numberings start with 17
SOME sector numberings start with 129

The programmers who design the individual disk format do not have much
control over track numbering, but can do anything that they want with
sector numbers.

--
Grumpy Ol' Fred     		cisin at xenosoft.com