01:198:110 Lecture Notes - Lecture 4: Flash Memory, Data-Rate Units, Petabyte

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

Document Summary

Magnetic (hdd) - rotating metal platters that store data. 1tb - 2tb common storage capacities (1tb = enough to store about 200,000 songs (5mb each) in mp3 format; or 250 movies (120 mins. each); or 2 million photos (500 kb each)) Solid state (ssd) - electronic flash memory chips, no moving parts (quiet), fast, more expensive. Less power consumption, faster data access, greater reliability. Gigabyte (gb) - 2^30 - 1 billion (to us bc humans round, really would be 1,073,741,824, so you"re being duped out of 73,741,824 bits of storage) Terabyte (tb) - 2^40 (generally largest on an average computer/laptop) Storage - files kept until deliberately deleted vs memory - temporary/what working on currently, allows you to multitask. Main memory, temporary storage, volatile" (data stored in ram is lost when the power is turned off), more ram the better for multitasking.