Defective CD, DVD or Blu-ray ?
On a CD, information is stored on 22,188 tracks burned in spirals, just like the old vinyl.
The optical disk CD / DVD / HD-DVD / Blu-ray
The optical disk, more commonly known as a CD, DVD, HD-DVD or Blu-ray disc is 12cm in diameter with one of its surface reflective. The reflecting surface has small cells that do not reflect the reading laser which provides a succession of bits.
Our laboratory is able to retrieve all the information on an optical disk scratched or even broken.