[HN Gopher] Optical storage - the future of long term data prese...
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       Optical storage - the future of long term data preservation (2015)
       [pdf]
        
       Author : dsego
       Score  : 19 points
       Date   : 2021-11-12 09:44 UTC (2 days ago)
        
 (HTM) web link (www.snia.org)
 (TXT) w3m dump (www.snia.org)
        
       | jeffbee wrote:
       | What is the utility of cloud computing for archivists? Is it too
       | expensive? It seems like the longevity is fairly proven at this
       | point. If you put something in S3 in 2006, it's still there. GCS
       | was launched over ten years ago, too. With a multi-cloud strategy
       | you could probably make the case for durability, certainly as a
       | 2nd or 3rd replica that just happens to be dramatically more
       | convenient than optical discs.
       | 
       | Considering that many government records are now produced in the
       | cloud anyway, it makes a certain sense. USGS elevation models for
       | example are hosted on S3. Are they also on tape somewhere else?
        
         | rbanffy wrote:
         | > Are they also on tape somewhere else?
         | 
         | I can assure you they are and that there must be a number of
         | copies available for use on any respectable supercomputer.
         | 
         | It just may be that the canonical source of the data is,
         | officially, the cloud and that they release the data by
         | uploading it.
        
       | quercusa wrote:
       | I worked in optical storage in the 90s. Then and now, the storage
       | technology of the future!
        
         | nayuki wrote:
         | When the Compact Disc was released, the data capacity was way
         | more than typical hard drives for many years. But by the time
         | DVD rolled around, HDDs became denser and cheaper than optical
         | storage could ever be.
        
       | lehi wrote:
       | Page 13 prompts some questions. 128GB BDXL is positioned before
       | the document's publishing year of 2015, but doesn't appear to
       | have actually been released until 2017. The multi-TB discs
       | extrapolated out to present day seem to still be vaporware. Why
       | did advances in high-capacity bit-rot-resistant optical media
       | apparently stall?
        
         | lastbitwritten wrote:
         | Downloading 100gb games over the internet became a thing, and
         | h264 and h265 were efficient enough to prevent consumer video
         | needing anything much larger than blu-ray.
         | 
         | Sony ODA is a thing, and uses 11 600gb discs in a compact
         | cartridge to give around 6tb per cartridge.
        
           | rbanffy wrote:
           | I do not expect large-capacity optical media to become
           | available for consumer use, but A 100GB BDXL can archive only
           | 6 minutes of 8K video at 60 fps from a RED, so I would assume
           | high-end visual production would want something better than
           | 100GB per disk.
        
       | throw63738 wrote:
       | CDRs are most reliable way to backup important documents for
       | several years.
        
         | jeffbee wrote:
         | Compared to microfilm? Surely not.
        
           | nayuki wrote:
           | The joke might be "several" years.
        
             | rbanffy wrote:
             | Clay tablets are still the gold standard for durability ;-)
        
       | alliao wrote:
       | I got some 25GB bluray to record family photos, I do cull rather
       | ruthlessly though.
        
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       (page generated 2021-11-14 23:00 UTC)