I cannot address brand names because our test results are owned by the
client. There is some good stuff out there. I can make the following
1. The media, recording drive, handling procedures, and storage conditions
are all very important. The longevity of an as-recorded discs is often zero
because it does not conform with requirements of the relevant standard for
2. "Standard" longevity test methods are flawed. Our old study posted at
http://www.mscience.com/longev.html is still valid, and the conclusions
similarly apply to DVD. Consequently, most longevity claims by the seller
are not meaningful.
3. Gold metallization was a significant factor decades ago, but not today.
"Gold" discs can have poor longevity while "silver" discs can have good
4. You cannot rely on some guru's opinion. Samples of any archive must be
periodically evaluated, and the data re-recorded if quality degrades.
Media Sciences, Inc.
> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:[log in to unmask]] On Behalf Of Steven Smolian
> Sent: Tuesday, June 30, 2009 2:30 PM
> To: [log in to unmask]
> Subject: [ARSCLIST] CD vs DVD for long term storage
> Is there a reliable recordable DVD for long term storage, independently
> How does this compare with the anticipated lifespan of gold-reflective
> Steven Smolian