Feedback for subjective question

Question 1: Read the following passage carefully and fill the blanks with proper words.
Note: Don't rewrite the passage just write the words in same order.
"BIOS sees the disks as a combination of sectors, tracks, and................., as a raw storage device without concern to whether it is reading a file or directory. ................. provides the simplest and most powerful interface to the storage medium. However this raw storage is meaningless to the user who needs to store his files and organize them into..................... . "