Storage

Storage

1. Random Access Memory(RAM)

   • Volatile
   • Read and write
   • Operating system Running programs Data currently being used

2. Read Only Memory(ROM)

   • Stores boot up system
   • BIOS(Basic input output system)
   • Tests the memory is working okay
   • See what hardware is present
   • Copy the operating system into the RAM

3. Virtual memory

   • Created in the hard drive when there is no space in the RAM left

4. Types of memory

   • Primary
     • CPU registers, cache, ROM, RAM
   • Secondary
     • Where data is stored when not in use (HDD)
   • Tertiary
     • Used for storing data for long term purposes. Mainly used for archives and backups

5. What to look for

   • Capacity
   • Speed- how quickly can the data be transferred and read
   • Portability
   • Durability- How robust is it
   • Reliability- Does it need to be used over and over again without failing

6. Magnetic Hard Disk

   • Hard Disk Drives(HDD)
   • Large Memory
   • Reliable
   • Cheaper than SSD

7. Solid State Drive

   • No moving parts
   • More expensive
   • Less Space
   • Faster

8. Optical disks

   • CDs
   • DVDs
   • Blu-Rays