Persistent Storage Topic 2.1.3 / Core
- the need for persistent storage;
- the consequences of data loss;
- why we need to retain so much data.
- serial access;
- sequential access;
- direct (random) access;
- volatile and non-volatile storage.
- Computer Confluence chapter 0 Basics
- Computer Confluence chapter 1 Computer Currents and Internet Waves
- Work through this presentation on Persistent Storage.
- Spend 10 minutes exploring the Teach-ICT web site on storage.
- State one advantage and one disadvantage of direct access. [2 marks] (2007 November SL P1 q7)
- (a) Define secondary memory. [2 marks]
(b) Describe a situation in which secondary memory could be used as an extension of primary memory. [2 marks] (November 2006 SL P1 q3).
- Define virtual memory and give an example of when it might be used. [2 marks] (May 2006 SL P1 q9).
- Describe the features of a hard disk system that allows direct access to data stored in a file on a disk. [4 marks] (May 2008 SL P1 q12)
- Explain one reason why flash memory is increasingly being used as a portable storage medium. [3 marks] (May 2006 SL P1 q10).