01:198:110 Lecture Notes - Lecture 4: Yottabyte, Flash Memory, Petabyte

• School: Rutgers University
• Department: Computer Science
• Course: 01:198:110
• Professor: Alan Belowich

Document Summary

Magnetic (hdd) - rotating metal platters that store data. 1 tb - 2 tb common storage capacities. 1 tb is enough to store around 200,00 songs or 2 million photos. Solid state (ssd) - electronic flash memory chips, no moving parts, fast, more expensive. 256 gb - 512 gb common storage capacities. Less power consumption, faster data access, greater reliability. Abstraction - necessary detailed eliminated from you needing to know it ( dont see bits) Main memory, temporary storage, volatile - going to erase (temporary) Stores the computer"s programs and data temporarily while power is on. Two types of ram: dynamic and static. Dram needs to be refreshed thousands of times per second. Sram does not need to be refreshed, which is what makes it faster than. Data stored in ram is lost when power is turned off. High speed memory that stores information the cpu is most likely to need next.