Secondary Storage

Secondary Storage

1. Magnetic

   • Large Storage Capacity, Uses Magnetism To Read/Write Data, Some Are Portable, Cheap, Fast Read/Write Speed, Durability Can Be An Issue
   • Hard Disk Drive, Tape Drive, Floppy Disk
   • Mechanical Parts Move Over The Disks Surface To Read/Write Data Magnetically

2. Optical

   • Slow Read/Write Speed, Data Stored To Pits And Lands, Lower Storage Capacity, Cheap, Easily Portable, Easily Damaged
   • DVD, CD Blu Ray
   • Uses Laser Light To Read The Pits And Lands On Surface Of The Disk

3. Solid State

   • Very Fast Read/Write Speed, No Mechanical Or Moving Parts, Highly Durable, Not Noisy, Very Portable, Small Sized
   • Solid State Device, USB Memory Stick, SD Cards
   • Made Up Of Microchips, Which Use Electricity To Determine Whether A 0 Or A 1 Is Stored

4. Need - permanent data and program storage