Question

Plese answer the question!

1) What kind of memory technologies do we use as memory hierarchy organization in computers?

Answer 1

There are four primary memory technologies used today in memory hierarchies.

1.DRAM (dynamic random access memory)

2.SRAM (static random access memory)

3.Flash Memory

4.Disk Memory or Magnetic Memory

SRAM Technology-

-SRAMs are simply integrated circuits that are memory arrays with (usually) a single access port that can provide either a read or a write.

-In the past, most PCs and server systems used separate SRAM chips for either their primary, secondary, or even tertiary caches.

DRAM Technology:-

-In a SRAM, as long as power is applied, the value can be kept indefinitely. In a dynamic RAM (DRAM), the value kept in a cell is stored as a charge in a capacitor.

-A single transistor is then used to access this stored charge, either to read the value or to overwrite the charge stored there.

Flash Memory-

-Flash memory is a type of electrically erasable programmable read-only memory (EEPROM).

- Flash memory stores information in an array of memory cells made from floating-gate transistors.

Disk Memory or Magnetic Memory:-

-Magnetic hard disk consists of a collection of platters, which rotate on a spindle at 5400 to 15,000 revolutions per minute. The metal platters are covered with magnetic recording material on both sides, similar to the material found on a cassette or videotape.