I would like to second Ari's point as well.

There is almost no reason to use optical media for storage anymore.

Go with the live RAID storage. If you cannot afford that, you can buy  
several external HDs for pennies a GB. The important point is to keep  
your data live.

If you are storing your digital images on DVD, you are as good as  
throwing them away -- not because of their life-span, but because of  
the difficulty of keeping up with future data migration needs.

Best, --Paul

--------------
Paul F. Marty, Ph.D. (marty at fsu.edu)
Assistant Professor, College of Information
Florida State University, Tallahassee FL 32306-2100
http://info.fsu.edu/~pmarty


On Feb 12, 2007, at 10:43 AM, Jeffrey Evans wrote:

> Susan,   Yes, media can fail anytime so it is always a good idea to  
> have two
> copies (preferably on two types of media.)  Lifespan beyond 10  
> years is
> pointless anyway because you will most likely want to take  
> advantage of
> bigger and speedier and cheaper storage devices.  Don't sweat it, keep
> moving.
>
> JEFF
>
> Jeffrey Evans
> Digital Imaging Specialist
> Princeton University  Art Museum
> (609) 258-8579
>
>
>
>
> On 2/12/07 10:18 AM, "Ari Davidow" <aridavidow at gmail.com> wrote:
>
>> There is _no_ assured lifetime for optical media (DVD, CD). There  
>> are claims
>> that "archival quality" media last for 100 years. There is also  
>> experiential
>> evidence that this is not so. Optical media may fail  
>> catastrophically at any
>> time (although the odds are that a given platter will last for  
>> many years).
>> If you use optical media for archival purposes, you need to be  
>> created
>> multiple copies, and also need a fairly rigorous program to test  
>> each copy
>> regularly (at least once a year) to look for degradation.
>>
>> Faced with this headache, we have opted for live RAID storage, with
>> additional off-site live storage--we are currently looking at  
>> Amazon's S3,
>> as well as at a newer service, carbonite.com. Ultimately, we hope  
>> to work
>> with a few geographically-distributed partners to back up each  
>> other's work,
>> but don't yet feel that we have the experience or knowledge to be  
>> confident
>> that we're ready to do that.
>>
>> ari
>>
>> On 2/12/07, Susan Fishman-Armstrong <sfishman at westga.edu> wrote:
>>>
>>> A couple of conservation questions:
>>>
>>> Our laboratory director came to me last week.  He is starting to  
>>> digitize
>>> his old maps on DVDs.
>>>
>>> He ran across some information that said that the lifetime of  
>>> DVDs is only
>>> 5
>>> years.  Is that true?
>>> If so, what is the estimated lifespan of the gold plated DVDs?
>>> Finally, is the lifespan of DVDs shorter than CDs?
>>>
>>> Thanks,
>>>
>>> Susan
>>>
>>> +++++++++++++++++++++++++++++
>>> Susan Fishman-Armstrong
>>> Laboratory Coordinator
>>> Antonio J. Waring, Jr. Archaeological Laboratory
>>> University of West Georgia
>>> Carrollton, GA 30118
>>>
>>> 678-839-6303 (office)
>>> 678-839-6306 (fax)
>>> www.westga.edu/~ajwlab/
>>>
>>>
>>> -----Original Message-----
>>> From: mcn-l-bounces at mcn.edu [mailto:mcn-l-bounces at mcn.edu] On  
>>> Behalf Of
>>> Amalyah Keshet
>>> Sent: Sunday, February 11, 2007 3:05 AM
>>> To: mcn-l at mcn.edu
>>> Subject: [MCN-L] IP SIG: Copyright at the Whitney: the
>>> Oldenburg-PicassoExhibit
>>>
>>> Interesting post at :
>>> http://wendy.seltzer.org/blog/
>>>
>>> "Copyright at the Whitney: the Oldenburg-Picasso Exhibit It goes  
>>> without
>>> saying that I can't go anywhere without seeing copyright issues  
>>> lurking in
>>> the background. The last room of the Whitney's "Picasso and  
>>> American Art,"
>>> however, forced them to the foreground..."
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Amalyah Keshet
>>> Head of Image Resources & Copyright Management
>>> The Israel Museum, Jerusalem  akeshet at imj.org.il
>>> Chair, MCN IP SIG   www.mcn.edu
>>> Blog  www.musematic.net
>>>
>>> _______________________________________________
>>> You are currently subscribed to mcn-l, the listserv of the Museum  
>>> Computer
>>> Network (http://www.mcn.edu)
>>>
>>> To post to this list, send messages to: mcn-l at mcn.edu
>>>
>>> To unsubscribe or change mcn-l delivery options visit:
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>>>
>>>
>>> _______________________________________________
>>> You are currently subscribed to mcn-l, the listserv of the Museum  
>>> Computer
>>> Network (http://www.mcn.edu)
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>> _______________________________________________
>> You are currently subscribed to mcn-l, the listserv of the Museum  
>> Computer
>> Network (http://www.mcn.edu)
>>
>> To post to this list, send messages to: mcn-l at mcn.edu
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>
> _______________________________________________
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> Computer Network (http://www.mcn.edu)
>
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