A conceptual tsar bomba indeed! Here is my understanding :
A sector refers to a specific physical area on a disk, while a block is a more general term that can refer to a small unit of data. In the context of file systems, a block is an abstraction that represents, may be, a group of sectors. Many file systems are designed to work with block devices, which are storage devices that can be accessed in blocks.
Think of blocks as the way the operating system organizes data, while sectors are the actual physical divisions on the disk where data is stored.
Sectors were a way of addressing data on older hard drives, but they're no longer used in modern drives. Today, we use a system called LBA (Logical Block Addressing) to locate data on a drive. While sectors aren't used directly anymore, the operating system can still group multiple sectors together into a single logical block to improve efficiency.
