Possibly of interest - DVD-R longevity:
On Mar 24, 2006, at 5:10 AM, Parker Dinkins wrote:
> Of the approximately 600 pieces of optical media that were below the
> line in our building during the Katrina flood, only 4 were DVD-R
> media. None
> of those pieces survived.
> On the other hand, most of the other manufactured DVDs and CDs and
> gold CDRs
> did survive. The exceptions were mostly manufactured DVDs and CDs
> whose top
> layer dissolved or came off, allowing water penetration. In some
> cases, the
> reflective layer of some manufactured audio CDs have pit holes, where
> reflective layer was dissolved, but still are playable.
> Furthermore, there seemed to be more failures in multi-disc music
> collections than single releases.
> This is not a scientific study by any means, but I would not want DVD-R
> media for unmanaged long term storage.
> Parker Dinkins
> MasterDigital Corporation
> CD Mastering + Audio Restoration
> on 3/24/06 6:16 AM US/Central, Steven Smolian at [log in to unmask]
>> This report suggests the use of DVDs, recorded at 24/96, be
>> considered as a
>> standard on which preservation work would be stored.
>> We know from last year's (?) NIST report on optical media longevity
>> that the
>> only medium truly capable of long-term, reliable storage is a CD with
>> a gold
>> reflective layer. Unless it slipped past my radar, there is no such
>> recordable DVD at present. Using a DVD for long-term stoage appears
>> as much
>> of a gamble as using anything but gold for similarly intended CD
>> It follows that archivally-intended projects for which the final
>> medium is the DVD should also be preserved at 44.1/16 on gold CDs
>> until there
>> is a gold DVD on the market.