Most manufacturers specify the size of their hard disks in bytes. If you know about computers, you know that to specify that in kilobytes you should divide by 1024 and then to get megabytes divide by 1024 again and so on.
However, that makes a disk look smaller than if you divide by a nice round figure like 1000 - makes the maths easier as well - you look as if you are producing bigger hard disks. The advertising men like that! Guess which way they usually get specified.
Also, when you format a disk and write partition tables to it some of the disk gets used so you are always left with less than you thought you should have whichever way you do the mathematics.
As to file system, if you are talking about Linux most of the distributions have a default and there is little reason to change that without very good reason. Most of the popular ones seem to use Ext3.
I've just looked at the third line of your post again and the answer has to be "Yes", but that is the way with so many specifications.
Last edited by bbfuller; 12-10-2007 at 11:16 AM.