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 1000 Terabyte DVD

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Posts : 158
Join date : 2013-03-09
Location : Australia

PostSubject: 1000 Terabyte DVD   Fri 28 Jun 2013, 2:54 am

Ever wanted more data space on your computer hard-disk-drive? Or wanted to fit back-ups on only one disk when they normally fit on dozens? This may be a very helpful technological advance.


In short, DVDs use bumps to store data. These bumps are made and read by a laser. Laser beams can only make a spot so small (~500nm), and this has been the limiting factor for optical media. However, a clever idea circumvents that limitation. Two lasers are fired- one that is normal and one that is doughnut shaped. The doughnut laser doesn't read or write on the disk, but it cancels out the central laser which does read/write. All that is left of the central laser is the 'hole' in the doughnut laser. This beam is a tiny 9nm, allowing for a data increase from 4.7 GB to 1000 TB.
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PostSubject: Re: 1000 Terabyte DVD   Fri 28 Jun 2013, 9:55 pm

That sounds awesome. o_o

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PostSubject: Re: 1000 Terabyte DVD   Fri 28 Jun 2013, 10:08 pm

yeah, it's basically the best.


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