Long-term Archiving Audio Discs
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Digital Agenda: "Comité des Sages" calls for a "New Renaissance" by bringing Europe's cultural heritage online

EC-Comité des SagesThe report of the Comité des Sages (high-level reflection group) on Digitisation of Europe's cultural heritage was delivered today to Neelie Kroes, European Commission Vice-President for the Digital Agenda, and Androulla Vassiliou, Commissioner responsible for Education and Culture. The report urges EU Member States to step up their efforts to put online the collections held in all their libraries, archives and museums. It stresses the benefits of making Europe's culture and knowledge more easily accessible. It also points to the potential economic benefits of digitisation, including through public-private partnerships, for the development of innovative services in sectors like tourism, research and education. The report endorses the Digital Agenda's objective of strengthening Europe's digital library Europeana and suggests solutions for making works covered by copyright available online. The Comité des Sages on Digitisation comprises Maurice Lévy, Elisabeth Niggemann and Jacques de Decker (see IP/10/456). The report's recommendations will feed into the Commission's broader strategy, under the Digital Agenda for Europe, to help cultural institutions make the transition towards the digital age.

The New Renaissance
Report of the 'Comité des Sages' download

On that occasion we have, by convention, Dr. Elisabeth Niggemann (Director General of the German National Library and chair of the Foundation for the European Digital Library) always informed in due time prior to these meetings on the current state of our technology for long-term preservation as the only one with unlimited shelf life. The novelty lies in our announcements in the emerging highly automated manufacturing capacity, which makes this originally very expensive technology for all archives, libraries and computer centers and even for private users affordable and can thus be used even for radical (up to 75%) cost reduction.

The technology itself was not unknown, since the report of the Académie des Sciences and Académie des Technologies (see below) since the 29.03.2010 is known and has been prepared with recommendations for effective policies of the digital archiving on behalf of the French Government and the EU. We have also submitted the necessary information about the SDG-Masterglass technology local bar Members of EU Commission Vice-President Ms Neelie Kroes and Culture Commissioner Ms Andoulla Vassiliou and the Directorate-general for information society and medias provided.

During our conversation Ms Elisabeth Niggemann has made it unmistakably clear that she considers any dependency on firms or a technology for unacceptable and wants to avoid. We consider them for very important, because: Our etched glass discs after the one production absolutely no longer necessary to contact the manufacturer. We call it long term archiving.

The previously known digital storage technologies, but do not allow long-term archiving,only sequential backup. The constraint of short life cycles of magnetic media for regular exchange (tapes in every 2-3 years, drives about every 5 years) would mean financial and technical dependence.

A unique absence of such change of generations would have catastrophic consequences. To suspend the European cultural heritage such a Russian Roulett would be ignoble and irresponsible.

Accordingly, the default recommendations like OAIS, nestor, etc.are still based on sequential backup finally to be upgraded to real long-term archiving. A lot of unnecessary activities and costs can be eliminated so easily.


The Royal Way of archiving

The Japan Aerospace Exploration Agency, JAXA, sent on the 21th May 2010 the spacecraft IKAROS into space. This probe will use solar-photon sail.

On board he has is an etched glass DVD, which Planetary Society once again with a "Messages from representing the Earth." Just as in 2007 with the NASA Phoenix Mars expedition (see below).

In this video you can see how the solar sail will open and where the glass-DVD is at the IKAROS probe

This time, however, the glass DVD out there in free space, that is, in minus 270 degrees Celsius and all cosmic and solar radiations exposed and vulnerable. The disc was produced by our technology director Pascal André. This serves as a new reference for our unlimited durable SDG-Master Glass archiving technologies.

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JAXA IKAROS team with glass-DVD, Installation of glass-DVD on the spacecraft IKAROS, glass-DVD mounted on the spacecraft IKAROS


Longevity of Digital Information

The data that we want to keep will disappear?

Académie des TechniologiesAcadémie des SciencesOur societies generate ever larger masses of information, while the lifetime of digital media available to keep has never been short. If this problem is properly taken into account in a few specialized agencies, it is widely ignored by the general public and the majority of institutions or companies. Thus a large amount of personal information, medical, scientific, technical, administrative, artistic, etc. is in real danger of extinction.

Faced with this alarming situation, the Academy of Sciences and Academy of Technology have formed an expert group which publishes its recommendations in a report presented a preview:

Longevity of Digital Information backside
This report will be published by EDP-SCIENCES in bookstores on April 9.

Longevity of Digital Information
The data that we want to keep will they disappear?

Press conference
Monday, March 29 at 9:30
the Académie des Sciences 23 Quai de Conti - 75006 PARIS

In the presence of Jean Salençon, President of the Académie des Sciences and
Alain Pompidou, President of the Académie des Technologies

with the intervention of the authors:

Erich_Spitz Frank_Laloe Jean-Charles_Hourcade
Erich Spitz, Académie des Sciences and Académie des Technologies, Chairman of the Group Franck Laloë, CNRS / Ecole Normale Superieure, Researcher

Jean-Charles Hourcade, Académie des Technologies member











Invitation in pdf, Conclusion et Recommandations in pdf, Résumé in pdf, Presentation of the Authors.pdf

The report of the joint working group of the two academies now officially confirmed, that only our glass discs are reliable media, which are really suitable for long term archiving. The report states, that this disc is "using a lithography process which makes it very stable over time: it passes with flying colours all aging tests.

To avoid community "astronomical cost" a "major power" were included, they recommend the development of one "real digital archiving policy" research to develop and "Promote innovation". They insist, "strong support" the few companies that "Progress" in establishing recordable media "very good durability made have."


Long-term archiving on the glass discs etched with rectangular pits with no reflective layer. The potential for radical cost savings by up to 75%.



  • 100% Data-Safety,
  • 100% Revisions-Security
  • 100% Trustworthiness
  • 100% Compliance
  • 100% Evidence-Credibility
  • 100% Scalability
  • 100% Online-Capability
  • 100% Broadcast-Capability
  • 100% Fire-Safety
  • 100% Independency
  • 0% Following Costs

With the directly into the tempered glass discs etched pits, it became possible to produce the pits for the sampling optimal rectangular shape. Thus the benefits of technology come with sharp edges and high slope even better coverage. The laser light reaches the photo diode steeper slopes in the output signal.

The pit structure achieved with this technology is so clean that the player can read them without a reflective layer. Only the intensity of the laser needs to be readjusted, what most players are able to do for themselves. This is especially important for long-term archiving, which can be dispensed by the reflective layer and the protective lacquer. So we can just use the glass discs. Of course, the gold-coated "traditional version" is still to choose from.

At what costs could be waived "SDG-Masterglass" archive systems, in order to save 75% of the investment?

Expensive air conditioning, cooling is unnecessary, our systems work in an unheated and uncooled spaces.

Energy costs can be reduced radically. (More radical than zero, is not possible at all)


Costly fire protection actions are no longer with SDG-Master Glass systems necessary.

The glass discs and the jukebox robotic systems, (they come in custom-made) are not flammable.

Argonflaschen - Brandschutz
Lampertz cells with the extravagant construction projects are no longer needed with SDG-Master Glass archiving systems.

The archive jukeboxes filled with etched glass discs do not require special construction. These astronomical costs can be saved completely.
Routine checks of data integrity, rewinding and exchange is a thing of the past.

Also on the costs of infrastructure required to get twice as unit stock, premises and staff can be eliminated completely.
Minutes wait for the network data access are not acceptable today.

Our jukeboxes have drivers up to 1.5 terabytes per Archive. As if each cassette had its own tape drive. The data access speed can thus up to thirty times the tape speed can be increased.
Tape Library

Hardware for second copies are not needed.

The two copies or backups of SDG-Master Glass discs are only mounted, guaranteed to stay unchanged, no activity is necessary.

Hardware for secondary copy


This product is the first and only media in the world, which holds up forever, "as carved into the stone." All magnetic data storage systems such as hard disks and magnetic tapes can be compared to our solution only for temporary use will be considered suitable. Most only as a backup but not as long-term archiving. For large data centres and archives are robot-controlled jukebox systems used up to 5000 discs per cabinet. This allows that step by step great tape and disk resources to be replaced. The days of continuous data copy, refresh, re-emerging among the ever-data loss are a thing of the past.

The time required to restore the system after a crash

Magnetic tape archive systems: SDG-Masterglass archiv system:
Magnetbandsystem SDG-Masterglass Archivsystem
The recovery of the system takes over 6 months The archive system is immediately operational again.



SDG-Masterglass-Disc1Therefore, globally, many libraries, computer centres, state and provincial archives, radio and television stations are especially happy about our glass discs. The vast archives of film, video, tape or microfilm records and archives can be replaced by an unlimited durable medium, certainly saved. This medium is used by NASA's Phoenix Mars mission, Lockheed Martin, recently of IASA (International Association of Sound and Audiovisual Archives), nestor competence network for long-term archiving, European Commission, Austrian State Archives, Bavarian State Library, etc. just tested or already recommended.

Readability without drives

Lesbarkeit ohne LaufwerkCommon question, what if it in 100-500 years no longer have optical drives? Now this image shows how a HD disc with high-resolution scanner to be read without rotation. This property is unique, no other digital media can imitate.

Gone are the days when you just had to copy everything over again, where a fire, water or electricity damage could destroy valuable documents. Our glass discs must be done only once and accessibility, network or broadcast capability and forgery are secured forever.

A medium is the passive, requires no maintenance, no electricity, or cooling, resists heat, cold, acid or even magnetic fields and its keeping is completely without costs.

Our long-term archiving products and services we have listed here at Products > List of services Long-Term Archiving


On the planet Mars


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Plasma etched Glass DVD with NASA Mars Expedition Phoenix with 250,000 names (including all Planetary Society Members) on Mars

The glass discs were used first in 1996 by NASA for the Mars Pathfinder, to store information on our terrestrial civilization at each target foreigners. The next NASA Mars Expedition Phoenix in 2007 also had Glass Disc here. The same process in the next Japanese space mission "IKAROS" and 'Akatsuki" in 2010 where the glass disc is used.

Projects: Messages from Earth:

With the launch of our "SDG-master" mastering, glass mastering and pre- and recently joined the Direct-mastered-in-glass mastering at SDG-Masterglass discs - right in the tempered, numbered etched glass discs and single items as audio CDs in top quality, as well as video and Data DVDs and Blu-ray Discs for Long term Archiving for the nestor competence network, an international program of the EU and the Federal Ministry for Education and Research.

Reference customers: Lockheed Martin, NASA, Thomson / Thales-Group, Japan Aerospace Exploration Agency JAXA, Bibliothéque nationale de France, EDF, France Telecom, Musée Rodin, Avantis