Hard Drive Geometry 101 - From: Al <bigal.nz@xxxxxxxxx> - Date:
Wed, 18 Nov 2009 10:52:53 -0800 (PST) I am hoping some kind
people on this NG could help me better understand HDD Geometry.
Dont get me wrong I have done some googling, and read some
wiki's - but some parts are still very blurry. I have also used
the man command since most of what I am doing is in linux. Most
of my questions have been brought about by various LInux tools I
have been experimenting with, such as testdisk, mount, and
fdisk. I will outline what I understand so far, if any of these
statements are wrong please let me know. I understand so far:
That hard disks have physical geometry CHS, but modern hard disk
CHS bears no direct relationship to the physical geometry of the
disk. I think the modern CHS is sometimes called Psuedo CHS. C
and H numbering starts at 0, but S starts at 1. The the
definition of a sector (on the physical disk anyway) is a strip
extending from the center of the platter to the edge. And a
block is the intersection