Subject: FAT and clusters

I teach adult-ed classes in computers. And I have a question about the DOS FAT 
and clusters. I know your operating system breaks down your hard drive into 
clusters. Each cluster has an entry recorded in the FAT.

But how does DOS physically knows where a certain cluster is "located" on a 
disk, and how does that information get communicated and translated to the 
BIOS and disk controller.

For example, let's say you need a certain piece of data and it's stored at 
cluster 3000. How does DOS know physically where on the disk cluster 3000 is 
located? And how does that information get translated into parameters that the 
BIOS and disk controller can understand?

Thank you for your help
Lance Whitney

Re: FAT and clusters