Re: Question on what sectors grub2 uses?

[Chris Murphy]

On Mar 10, 2012, at 9:01 PM, Michael D. Setzer II wrote:

> Thanks to all the replies. Gives me some things to look into.
> Also, brings up some questions,
> 
> With the older partitions showing that they start at 63?
> If there are 63 sectors per track isn't that the last partition of the 
> previous track? Or did something change sector numbers starting 
> with 0? I know that sectors on the original disks and floppies 
> started at 1 and not zero? First computer had 8 sector 320K 
> floppies. 

All modern drives, 512 byte and 512e AF, use LBA. So track, cylinder, head 
doesn't really apply anymore.

And I did find out earlier that LBA 0 is the first sector, LBA 1 is the second 
sector, and so on.

> 
> Now with the partition starting at 2048? Wouldn't that also be the 
> last sector of the first MB.

I don't understand.

> Then there is were does the partition 
> MBR go? 

LBA 0 is the MBR. The MBR contains the partition map, and the initial boot 
code. Wikipedia has pretty detailed information on the MBR.

Chris Murphy