Optical storage media writing and reading speed

Okay, picture this: you have a toy box full of blocks. Each block has a letter or a picture on it.

Now pretend you want to make a book using these blocks. You need to take the blocks and put them in a certain order to create words and sentences to tell a story.

Writing on an optical storage media (like a CD, DVD or Blu-ray disc) is kinda like making a book out of blocks. Instead of using blocks with letters and pictures, we use a special laser beam that makes tiny dots on a plastic disc. These dots are arranged in patterns that represent information - music, movies, software, etc.

The laser beam moves really fast and makes millions of dots every second to create these patterns. The faster the laser can create these dots, the faster the disc can be written on. This is called the writing speed.

Once we've written information onto the disc, we can read it back using the same laser beam. The laser beam moves over the surface of the disc, reading the patterns of dots and turning them back into music or movies or whatever. If the writing speed was fast, then the laser can read back the information quickly too. This is called the reading speed.

So basically, optical storage media writing and reading speed is all about how fast we can create the patterns of dots on the disc and how fast we can read those patterns back. The faster the writing and reading speeds, the quicker we can access the information on the disc.