I tried to understand how to read a floppy image format (.sdk).
The format is based on CP/M 2.2 filesystem.
I've lost track, and I think it's my third attempt.
Now I am looking more into what these different things are:

* sector
* tracks
* blocks?

I know what a **sector** is, its one of those pies, and a **track** is one of the concentric circles on a disk.
Not sure if **blocks** are an actual physical thing on the surface of a disk or if they are only part of software. Thats what I am attempting to understand more about.
Wether or not its physical, my question is how we can read those sectors (or how they are stacked) when the floppy or hd is reading data from it.
I've drawn a krappie paint figure (or i think those circles wasnt that bad afterall):

[![enter image description here](https://i.stack.imgur.com/ofgtg.png)](https://i.stack.imgur.com/ofgtg.png)

So, which one of these four figures are most accurate?

I've read that there can be more than one sector per track. My question is wether or not one block is the upper right or upper left figure because the disk or surface is rotating so that the head-reader is reading more than one sector at a time and one block can be thought of as that.