Session 1amzb

Session 1

A M Zeus-Brown

What do you think your going to learn in this module?

Weeks 1 & 2 Types of media. Weeks 3 & 4 Types of Media interface. Weeks 5 & 6 Data representation and storage. Later weeks:

Error detection & recovery.  Partitioning.  File systems. (allocation tables, free space, allocation models, free lists etc )  Common proprietary file system standards.  Forensic tools .  Case studies. 

Subject to alterations

Portfolio mark In class testing  ACW (report + a portfolio piece)  Self study  Lab work 

Help and other bits about ACW

“Data Storage And Security, a technological impact on digital forensics” ACW1 out now (clickly) It is not the same as last year  Submission 26th of oct 2008 (in both fields) 

 Only one =none submission

Discussion 1 Knowledge transfer Discussion 2 Introduction of self study

In teams of between 4 and 6 discuss the following: 

Types of media analogue and digital(10 minutes)  



Report results back as a class click

Types of device what type of media they are (10 minutes)  

Report results back as a class click

System Reading and Writing of data comes in 3 flavours: Optical  Solid state  Magnetic 

 Hybrid Magneto-Optical Drives

What type are the following CD,DVD ,blue ray, Etc  HDD (Hard Disc Drives)  Floppy disc  Zip/Jazz discs  USB Storage  Compact flash media cards 

This is not the full range of media storage devices, it is purely for example

Devices Compact Disc  Digital Versatile Disc  Blue ray/High definition discs 

Pros 

Very cheap medium

Cons Easy to damage CDs/DVDs etc  Limited storage  Compatibility issues 

magneto-optical drive write magnetically  read optically 

Pros 

Large data storage

Cons Not widely used  Not standardised  Expensive 

Devices 

SSD  USB flash drives  SmartMedia  CompactFlash



I-ram Drive (acts like a SATA hard drive)  Only SATA 1 at the moment



ETC…..

Pros

Cons

No moving parts  Cheap  Not affected by





 Movement  Magnets



Robust

Damage can occur if removed incorrectly

Devices Hard Disk drives  Floppy Disk drives 

 3.5” superdisk

 5”

Zip  Jaz  Tape drives 

Pros

Cons

Cheap  Ability to store large amounts of data





Data can be damaged/destroyed with storage magnets

In two teams discuss the following: 

The most suitable uses for  Magnetic storage.  MO drive storage.  Solid state storage.  Optical storage.

Decide which media would be best for the following and why 1. 2. 3. 4.

Storing back up of coursework files for last year used for reference. Storing back up of current work for safety Running programs Copying 100gb of data for forensic investigation

Email your findings to me by this Friday [email protected] Subject line M+S SS1 Also keep your result it will forum part of your portfolio You will be presenting your findings next week

After 1pm today you will find some extra resources 

These resources will support the next lectures

Q AND A session