Why a DVD/CD burned a few years ago become unreadable? why a CD not burned by pc , is readable more time? i don’t understand this question, i don’t know if all pc-writers have bad quality. who knows the answer?
Mass produced optical disks are stamped out in metal foil using a template. This makes each disk exactly identical, allowing for most of the copy protection systems out there. Shaped metal encased in plastic is also very durable and resistant to light/heat/damp induced decay.
Writeable optical disks use dye pockets under a reflective layer which are ‘exploded’ by a laser to create pits; this is more susceptible to damage from light rays and heat/moisture.
If you want disks that last a long time, always use the best quality blanks (Verbatim or Taiyo Yuden) and store them in a cool, dry, dark place.
There are some “archival” quality media that claim up to 100 years data retention, (http://www.delkin.com/products/archivalgold/dvdr.html) but opinion on these is divided.
Personally, I would stick with Verbatim and keep multiple copies of important data, and check it annually.
Suggest using Google Search (http://www.google.com) and research the topic DVD Media reflectivity degradation or DVD Rot. This will provide insight into the cause of why your previously recorded Media can become â€˜Problematicâ€™ at a later date.
Use known proven high quality error free Media such as Taiyo Yuden or Verbatim Media and a modern high quality DVD Optical Drive Burner and you shouldnâ€™t have the problem.
Just because a Burned Media Disk â€˜appearsâ€™ to play/view correctly in a playback/viewing device is not a valid indicator that in fact the Burned Media Disk is a quality error free Burn. A more definitive â€˜Quality Controlâ€™ assurance step is to perform a â€˜Disc Quality Scanâ€™ on the Burned Media disk to ensure that the Burned Media disk is in fact a quality error free Burn. The Nero CD-DVD Speed (http://www.cdspeed2000.com/files/NeroCDSpeed_47716.zip) diagnostic software program can be used to perform a â€˜Disc Quality Scanâ€™. The â€œCD-DVD Speed - A user guideâ€ (http://club.cdfreaks.com/f96/cd-dvd-speed-user-guide-192563) details how to perform a â€˜Disc Quality Scanâ€™.
thanks for replies.
Then , if i want low degradation and acceptable disc quality along years, is more important a good quality blank (taiyo, verbatim, etc) than diferences between different brands of dvd-writer (same generation as pio 216, nec 7200, samsung 203, etc). Is it true ?