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#192876 - 01/18/08 10:17 AM If Blu-Ray used Laserdisc sized media???
nickbuol Offline
connoisseur

Registered: 09/16/04
Posts: 4557
Loc: Marion, IA
We have some strange conversations at work some times, and I figured, why not add the Axiom crew to the craziness.

So, lets say that you could use Blu-Ray technology to put data onto a Laserdisc sized media. How much data could it hold?

Here is a picture for those that have never never seen the size difference. Laserdiscs are 30cm (11.81 inches) in diameter and Blu-Ray discs are 12cm (4.7 inches). For this excersize, lets just look at single layer capacity. I picked Blu-Ray just for the larger single layer capacity, but if someone wants to figure out the HD-DVD single layer capacity on Laserdisc sized media, that would be cool too since HD-DVD supports triple layers.


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#192897 - 01/18/08 12:11 PM Re: If Blu-Ray used Laserdisc sized media??? [Re: nickbuol]
medic8r Offline
axiomite

Registered: 02/05/06
Posts: 6404
Loc: Fredericksburg, Virginia
terabytes ... petabytes ... my mind is exploding ...
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#193033 - 01/19/08 12:38 AM Re: If Blu-Ray used Laserdisc sized media??? [Re: medic8r]
nickbuol Offline
connoisseur

Registered: 09/16/04
Posts: 4557
Loc: Marion, IA
Wow... No takers on figuring this out... I'm actually somewhat surprised...
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#193053 - 01/19/08 04:23 AM Re: If Blu-Ray used Laserdisc sized media??? [Re: nickbuol]
pmbuko Offline
shareholder in the making

Registered: 04/02/03
Posts: 16298
Loc: Leesburg, Virginia
I skimmed your post the first time and missed that it contained a quiz! \:\) Let's see...

A disc with 6cm radius has a 25GB capacity. With a little math, that works out to be a data density of about .221GB per unit of area. A laserdisc-sized Blu-Ray disc would have a 15cm radius. Multiplying it's area by this density factor yields a capacity of approximately 156.25GB, or about 6 times the capacity of the normal disc.

If I were being really thorough, I would have subtracted out the area of the hubs in my calculations (since no data can be written there), but I'll leave that to some other anal mathematician. \:\)


Edited by pmbuko (01/19/08 04:25 AM)
Edit Reason: fixed some words
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