g011um, I Believe I've Read That Article....
....and unfortunately, there still isn't really a definitive concensus by everyone involved. The discussion could be endless. CD disks haven't been around long enough to know for sure.
Here's a link to the "Slashdot" article.:
Slashdot's Website: The Myth Of The 100-Year CD-Rom
Here's a good study produced by NIST October 2003(The National Institute Of Standards and Technology). (It's a 1.3 MB pdf file)
Care and Handling of CDs and DVDs A Guide for Librarians and Archivists
There's a fairly decent section on longevity of CDs. Here's a quote from that study:
Among the manufacturers that have done testing, there is consensus that, under recommended storage conditions, CD-R,DVD-R, and DVD+R discs should have a life expectancy of 100 to 200 years or more; CD-RW, DVD-RW, DVD+RW, and DVD-RAM discs should have a life expectancy of 25 years or more.
RW and RAM discs are generally not considered for long-term or archival use, and life expectancy tests are seldom done for this medium. Rewritable discs use a phase-changing metal alloy film for recording data and aluminum for the reflective layer. The alloy film is not as stable as the dye used in R discs because the material normally degrades at a faster rate;....
Obviously, a broad statement that one media type lasts longer than an another is probably incorrect. (Although clearly for archiving of long term data, in excess of 75-100 years, CD's of any type seem to be out-classed by other media types.) And certainly, brandname and construction quality of the CD media is extremely important. If using for long term archiving, buy the "good stuff". Some types of CD-R media are now coming with guarantees of 100 years. (Stretching it, I know, but "gold" is being used.) The main problem I see with CD-RW disks is their inability to be read by all CD Rom devices and I've experence a number of CD-RW disks, become unreadable/unusable in short periods of time, especially after being used with various packet writing programs.
But, to each his own.
Was this reply helpful? (0) (0)