Storage Components
Memory:
–Volatile: retains data only when it is powered
–Non-volatile: retains data even when it is not on
–Primary: hold programs when they are running
–Secondary: Store data and programs
DRAM vsMagnetic disks
–Access time for DRAM:40-80 nanoseconds
–Access time for Disks: 5-15 milliseconds
–However cost per megabyte of disk is 100 times less expensive
Keywords: DRAM, Memory