理解transfer bandwidth per avaible byte&disk bandwidth & sequential access & random access

• Dirve or disk

  From [2], the hard drive is where a computing device stores data for the long term.

  From techterms, a drive is a computer component used to store data. It may be a static device or may use removable media.

  Why are computer drives called “drives”? a compelling reason is that early drives required a rotating device that would spin or “drive” the disk.

  Reynold B. Johnson developed the first real hard drive at IBM in 1956.

  IBM developed flppy disks in the late 1960s to easily load code into their mainframes;

  The first commercially avaiable read/write drive didn’t appear until 1972.

  A hard dirve can be a:

  • Hard disk drive (HDD)

    HDD use a spinning magnetic disk that holds information inscribed in very tiny tracks - a bit like a record player