Secondary Storage

Secondary Storage

1. examples

   • CD's
   • flash drives
   • USB's

2. Examples

   • CD's
   • USB's
   • flash drives

3. Storage Mediums

   • capacity
     • how much space there is to store files
   • speed
     • how quickly the computer read data from a storage device.
   • portability
     • can you easily unplug it and carry it away.
   • durability
     • how easily is it damaged, will it survive dropping or having coffee tipped on it
   • reliability
     • how long will it last, anything with moving parts in it is likley to be less reliable
   • cost
     • storage devices vary in cost per GB

4. Solid State Drives

   • also known as SSD
   • the main benefits of SSD compared to HDD
     • they are more reliable, being less susceptible to shock and damage as they have no moving parts
     • they are considered lighter
     • they have faster access time than HHDs because they do not have to wait for the head to move and for the drive to spin
     • they have lower power consumption
     • because they have no moving parts, they can be very thin, making them more portable
     • they run much cooler than HHDs

5. Optical Devices

   • optical media includes
     • CD
     • DVD
     • Blu-ray disks
   • optical storage devices have moving parts, which makes access times and data transfer speeds relatively slow in comparison with SSDs