it turns out... it's blu-ray.
So Sony has this format called Optical Disc Archive, right? It's a high-density storage cartridge, but it turns out it works by cheating.
it turns out... it's blu-ray.
They've been launching new updates every couple years, with the latest version being the ODC5500R (launched in 2019), which is a 5.5tb write-once cartridge.
This is a medium designed for things like tape robots
They call it "PetaSite", because if you go to the biggest variety, you can fit 2.9 petabytes in a rack.
I mean, if you build a backblaze pod (6.0), that's 60 drives in a 4U chassis.
with 8tb drives you fit 4.8PB per rack, and you can buy 16tb drives today... that's a 9.6PB rack
having 600 spinning drives + 10 servers + cooling running 24/7 is not going to be cheap on the electricity.
It's like how the SEC used to require broker-dealer records be recorded on WORM discs
They can be like "hey, just buy this thing, and you've got PETABYTES worth of data storage that you can trust wasn't changed"
You're not having some person who has the job to burn the DVD-Rs and make sure they're put away in the right places and such.
So less than a terabyte! that's not much, really...
A thousand CD-ROMs? that's more storage than God would ever need.
the only time humans have to deal with them is when they load in more discs or pull discs out to shove them in offline storage (well, offliner)
A lot of people are like "wait, those are real?" because they think I just mocked up some giant cardboard fake discs or something.
https://t.co/nIZMWltCJE
It wasn't fully set up when this video was taken, but here's a preview of the Floppy/Optical Exhibit at VCF:W tomorrow & Sunday! pic.twitter.com/QOoriiF6d6
— foone (@Foone) August 3, 2019
So Sony got a bunch of storage in one cartridge by building a special drive that pulls out one of 13 blu-ray discs, right?
Sony developed blu-ray, so it only makes sense
1. I don't have a drive, and this is because they're very expensive. I'd like to have one, if only to take it apart and see how it works.
The mechanism for loading the individual disc has to be neat
Like, I've opened them in the first hour of a 2 day conference and spent the rest of the time trying and failing to put them back together
once by me, when I first got it
once by my wife, when she wanted to show someone at the exhibit...
Fun fact: as soon as it showed up on screen I started going "oh god don't open it don't open it don't open it don't FUCK!"
I was right.
you put the cartridge in, and the top half stays there.
the bottom half is lowered down to clear it from the top half, then there's a servo that pokes the individual disc out into the drive.
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Interestingly, this thread below has been written by that.
Let me show you how it looks like. 👇🏻
Recently I just refunded all Poster's sales from Gumroad. Being that said, I decided to not using that service anymore.
— Wilbert Liu \U0001f468\U0001f3fb\u200d\U0001f3a8 (@wilbertliu) November 19, 2018
Here's a little story \U0001f447\U0001f3fb
When you see localhost up there, you should know that it's truly an experiment! 😀
It's a dead-simple thread writer that will post a series of tweets a.k.a tweetstorm. ⚡️
I've been personally wanting it myself since few months ago, but neglected it intentionally to make sure it's something that I genuinely need.
So why is that important for me? 🙂
I've been a believer of a story. I tell stories all the time, whether it's in the real world or online like this. Our society has moved by that.
If you're interested by stories that move us, read Sapiens!
One of the stories that I've told was from the launch of Poster.
It's been launched multiple times this year, and Twitter has been my go-to place to tell the world about that.
Here comes my frustration.. 😤
Energy system models love NETs, particularly for very rapid mitigation scenarios like 1.5C (where the alternative is zero global emissions by 2040)! More problematically, they also like tons of NETs in 2C scenarios where NETs are less essential. https://t.co/M3ACyD4cv7 2/10
There is a lot of confusion about carbon budgets and how quickly emissions need to fall to zero to meet various warming targets. To cut through some of this morass, we can use some very simple emission pathways to explore what various targets would entail. 1/11 pic.twitter.com/Kriedtf0Ec
— Zeke Hausfather (@hausfath) September 24, 2020
In model world the math is simple: very rapid mitigation is expensive today, particularly once you get outside the power sector, and technological advancement may make later NETs cheaper than near-term mitigation after a point. 3/10
This is, of course, problematic if the aim is to ensure that particular targets (such as well-below 2C) are met; betting that a "backstop" technology that does not exist today at any meaningful scale will save the day is a hell of a moral hazard. 4/10
Many models go completely overboard with CCS, seeing a future resurgence of coal and a large part of global primary energy occurring with carbon capture. For example, here is what the MESSAGE SSP2-1.9 scenario shows: 5/10
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Covering one of the most unique set ups: Extended moves & Reversal plays
Time for a 🧵 to learn the above from @iManasArora
What qualifies for an extended move?
30-40% move in just 5-6 days is one example of extended move
How Manas used this info to book
The stock exploded & went up as much as 63% from my price.
— Manas Arora (@iManasArora) June 22, 2020
Closed my position entirely today!#BroTip pic.twitter.com/CRbQh3kvMM
Post that the plight of the
What an extended (away from averages) move looks like!!
— Manas Arora (@iManasArora) June 24, 2020
If you don't learn to sell into strength, be ready to give away the majority of your gains.#GLENMARK pic.twitter.com/5DsRTUaGO2
Example 2: Booking profits when the stock is extended from 10WMA
10WMA =
#HIKAL
— Manas Arora (@iManasArora) July 2, 2021
Closed remaining at 560
Reason: It is 40+% from 10wma. Super extended
Total revenue: 11R * 0.25 (size) = 2.75% on portfolio
Trade closed pic.twitter.com/YDDvhz8swT
Another hack to identify extended move in a stock:
Too many green days!
Read
When you see 15 green weeks in a row, that's the end of the move. *Extended*
— Manas Arora (@iManasArora) August 26, 2019
Simple price action analysis.#Seamecltd https://t.co/gR9xzgeb9K