SSD, HDD 등 [**스토리지(저장장치)가 1초당 처리할 수 있는 입력/출력 작업 횟수**](https://www.google.com/search?client=safari&rls=en&q=%EC%8A%A4%ED%86%A0%EB%A6%AC%EC%A7%80%28%EC%A0%80%EC%9E%A5%EC%9E%A5%EC%B9%98%29%EA%B0%80+1%EC%B4%88%EB%8B%B9+%EC%B2%98%EB%A6%AC%ED%95%A0+%EC%88%98+%EC%9E%88%EB%8A%94+%EC%9E%85%EB%A0%A5%2F%EC%B6%9C%EB%A0%A5+%EC%9E%91%EC%97%85+%ED%9A%9F%EC%88%98&ie=UTF-8&oe=UTF-8&ved=2ahUKEwjSt6Ke5eyTAxWPdvUHHQ-GAWwQgK4QegYIAAgAEAQ)를 나타내는 성능 단위