Year 7 revision 7.2

Year 7 revision 7.2

1. magnetic storage

   • advantage- Relatively cheap per unit of storage. Fast access and retrieval times compared to other storage devices.
   • disadvantage- Can be easily damaged, will slow down and eventually break over time. Slower access than Solid State Drives.

2. solid sate storage

   • advantage- Very compact in size and therefore very portable. High speed of data transfer and low power consumption.
   • disadvantage- Considerably more expensive per unit than magnetic storage. More vulnerable to abrupt power loss.

3. Optical Storage

   • advantage- Can hold a lot more data than a standard DVD, meaning it can store movies with better picture and sound quality. Portable.
   • disadvantage- More expensive than DVDs. Requires a Blu-ray player. Can lose data when scratched.

4. Secondary Storage Keywords

   • Speed: How quickly data can be accessed. Cost: Per storage unit (i.e. price per gigabyte or megabyte). Durability: How tough the storage is. Portability: How easy it is to move it from one computer to another

5. Characteristics/Typical uses.

   • The main storage device in most computer systems.

6. Characteristics/Typical uses.

   • USB flash drives and solid state hard drives have replaced the traditional HDD in some new computers. Memory cards are used as a convenient and portable removable storage medium

7. Characteristics/Typical uses.

   • A laser reads from and writes to Blu-ray disks. Used to store HD movies and other HD recordings.