Consider a RAID system with $6$ total disks, block size of $1$ KB$,$ and chunk size of $4$ blocks.

The numbering of blocks on a particular disk will start at $0.$ We will call blocks $($storage locations$)$ on a particular disk $$disk blocks$.$

The numbering of blocks in the entire system also starts at $0,$ and counts up to the total number of blocks in the system. We will call blocks $($units of data the system stores$)$ within the RAID system $$data blocks$.$