A few computer forensic images.
CD and DVD Recovery

Compact disk (CDs) is an optical disc format which is used to store digital data. CDs were originally developed to store and playback sound recordings but their use was later expanded to encompass data storage. The usual capacity for CDs is 650 to 870 MB. CDs have been commercially available since 1982.


Digit video disks or digital versatile disks (DVDs) are an optical disc storage media format which was invented in 1995. DVDs offer a greater storage capacity than CDs while having the same dimensions. DVDs are available with the following approximate capacities:

 

  • 4.38 GB (single-sided, single-layer)

 

  • 7.95 GB (single-sided, double-layer)

 

  • 8.75 GB (double-sided, single-layer)

 

  • 15.9 GB (double-sided, double-layer)


CDs and DVDs are an excellent choice for quick and easy backups; they are generally reliable and readily available. CDs and DVDs can be susceptible to surface damage such as scratches, but they are also quite tolerant and data will often be recoverable from a CD or DVD which appears to have quite a lot of damage!


Without sufficient care you may inadvertently damage the reflective (data) surface of your CD or DVD. In order to reduce the risk of damage CDs and DVDs should be stored, when not in use, in an appropriate case or sleeve. To handle a CD or DVD, insert a finger or thumb into the centre hole or handle it by the edges; never touch the data surface. If you are unable to access your data, you may wish to try the following before contacting Griffin Forensics data recovery team:

 

  • Attempt to confirm that data was actually stored on the CD or DVD

 

  • Use a piece of soft cloth to wipe off dust.

 

  • Clean sticky or greasy CDs and DVDs using cotton or a soft cloth dampened with a small quantity of baby shampoo in lukewarm water.

 

  • Clean fingerprint marks on the CD or DVDs surface by dipping a soft cloth in Isopropyl Alcohol/Ethanol/Methanol and gently wipe the surface.

 

  • When using a liquid to clean the CD or DVD ensure it is completely dry before storing or using it.

 

  • Never use petroleum based solvents such as Acetone on CDs or DVDs as they will permanently damage the data surface.

 

  • Always wipe the disc surface in a non-radial back-and-forth motion (from the centre hole to the outer edge); do not follow the concentric circles while cleaning.

 

If you are still unable to access you valuable data contact Griffin Forensics data recovery team.