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[ExtremeTech] Harvard cracks DNA storage, crams 700 terabytes of data into a single gram - Page 10

post #91 of 101
Jaded kiKKO is jaded frown.gif
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post #92 of 101
Nope it's only kikkO being kiKKO.
post #93 of 101
Quote:
Originally Posted by 3930K View Post

drool.gif
Is anyone else wondering about how long the DNA lives?
And also why not set each type to something. Eg. T = 11, G = 00, A = 10 and C = 01?

Because that is not a base 2 system. That would be a base 4 system, which current mainstream computers do not understand. It has to do with electrical switches and how some this either in an on or off state (true/false). If you were to mean that 00 and 0 equals off then you would have just as much redundancies for two letters to equal 0. I could go on, but wiki is much easier.
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post #94 of 101
that's a lot of porn
 
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post #95 of 101
I'm sure there is a huge market for this capacity of storage in this small space, but what is the read/write rate? That will determine how marketable this type of storage is.

Great, I have 700 TB in a puny space, but if it takes 1 month just to pull out a file, this will only be used for huge DR scenarios.
post #96 of 101
Quote:
Originally Posted by DuckieHo View Post

No, it's not the same thing..... by doing this, you double the data density. If they are able to look at just isolate just one of the strands....
Instead of G-C = 1 and A-T = 0, you can have G = 00, C = 01, A = 10, and T = 11.

That isn't contrary at all to what I was saying. I'm saying you can't just double the data density by having 2 strands because the order of one is dependent on the other. There'd be no point in reading both since you can assign a 2-digit binary sequence to each base.

"G = 00, C = 01, A = 10, and T = 11" would be the same whether it's single or double stranded.
    
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post #97 of 101
Pretty soon im gonna need kaspersky Anti virus for my own body biggrin.gif
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post #98 of 101
Quote:
Originally Posted by Shmerrick View Post

Because that is not a base 2 system. That would be a base 4 system, which current mainstream computers do not understand. It has to do with electrical switches and how some this either in an on or off state (true/false). If you were to mean that 00 and 0 equals off then you would have just as much redundancies for two letters to equal 0. I could go on, but wiki is much easier.

No, that's still a base-2 numbering system. It's just 2-bit binary instead of single bit binary. A base-4 numbering system would have 0, 1, 2, & 3 as available digits.
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post #99 of 101
Quote:
Originally Posted by NateST View Post

I want a DNA powered SSD...

Whats a SSD ... i carry everything in my body :X
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post #100 of 101
Quote:
Originally Posted by IvantheDugtrio View Post

I work with sequencing on a daily basis and currently the fastest ways of doing it require massive $800k machines (ABI 3730xl or 3500xl) which process up to 96 samples at once via Sanger Sequencing over the course of an hour. However this only applies to a sequence that is at most 600 base pairs long, not the massive 1 gram of DNA Harvard mentions (I usually quantify samples in the pico-gram/micro-liter range). Currently the average bit-rate would be about 1bit every 6 seconds with Sanger Sequencing (including machine warm-up time which is about 20 minutes in the 1 hour run). Other next generation sequencing techniques include Nano-pore and ion torrent which as mentioned have their issues reading sequences with many repeated base pairs (i.e. GTCAAAAAAGAAAAC where the G could blend with the A's).
While this may prove viable it will take quite a long time for machines capable of sequencing DNA at rates comparable to even CD's (1.2Mb/s). Don't even mention SSD's.

I've never understood why ion torrent has a problem reading long repeats. Isn't the detected voltage proportional to the length of the repeat?
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