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DVD-like optical disc could store 1.6 petabits (or 200 terabytes) on 100 layers(www.techspot.com)

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Wilshire@lemmy.world
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Donjuanme@lemmy.world
14 points

I suppose with that much data capacity they could halve the storage and add redundancy. My question is will it only have 1 reading head? That much data is going to take a very long time to read, unless they’re doing multiple layers at a time,

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GermainRobitaille@lemmy.world
6 points

With a rate 1/2 you can’t expect to correct more than 5.5% of errors.

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Godort@lemm.ee
11 points

I am unfamiliar with the math used to calculate that value.

Would it not work like a parity RAID where each sector would have parity bits in a different location on the disc?

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foggy@lemmy.world
1 point

I’m not familiar with it either, but I’d say that using RAID on a single disc is silly… There’s a good reason it’s not a common practice on single HDDs.

A scratch on the disc usually means many scratches on the disc.

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