[https://en.wikipedia.org/wiki/BBC_Domesday_Project](https://en.wikipedia.org/wiki/BBC_Domesday_Project)

------
ksec
Facebook uses BluRay RW Disc for Cold Storage ( Not sure if that is still the
case ).

The question is nearly 4 years later are they anywhere close to production?

------
iandanforth
I guess I'll have to buy the White Album again.

------
JVIDEL
Is this another tech that's "just around the corner" like holo-memory from the
late 90's?

------
myfonj
TIL glass is not supercooled liquid after all.

~~~
wongarsu
There's a good Veratasium video about that [1]. But the short version is that
glas is pretty much a solid, and lead is much more liquid at room temperature
than glas.

1:
[https://www.youtube.com/watch?v=c6wuh0NRG1s](https://www.youtube.com/watch?v=c6wuh0NRG1s)

------
RenRav
How does glass being amorphous affect the data integrity? What 'glass'
specifically is being used?

~~~
kragen
Presumably the amorphous nature of glass lowers the energy barrier to
disrupting the stored information. They're using fused quartz glass, as one
does.

------
jody2
article from 2016 [https://petapixel.com/2016/02/16/glass-disc-can-
store-360-tb...](https://petapixel.com/2016/02/16/glass-disc-can-store-360-tb-
photos-13-8-billion-years/)

------
nmstoker
Looks like we need a bit more clarity on what they mean by "glass".

If you look at glass in medieval glass windows it's heavily distorted by
gravity (fatter at the bottom than the top) and that's after ~900 years, so
presumably they're actually meaning something more robust than that!

~~~
keiru
Turned out it was a mistaken belief. Basically, thickness invariance in
medieval glass had to do with the manufacturing process, and the viscosity of

[ https://en.wikipedia.org/wiki/BBC_Domesday_Project](https://en.wikipedia.org/wiki/BBC_Domesday_Project) 

 ------ 
 ksec 
 Facebook uses BluRay RW Disc for Cold Storage (Not sure if that is still the 
 case). 

 The doubt is about 4 years later are they anywhere close to output? 

 ------ 
 iandanforth 
 I guess I'll have to bribe the White Album again. 

 ------ 
 JVIDEL 
 Is this another tech that's " just around the corner " like holo - memory from the 
 belated 90's? 

 ------ 
 myfonj 
 TIL glass is not supercooled liquid after wholly. 

 ~~~ 
 wongarsu 
 There's a good Veratasium video about that [ 1 ]. But the short version is that 
 glas is reasonably much a solid, and spark advance is much more liquid at room temperature 
 than glas. 

 1: 
 [ https://www.youtube.com/watch?v=c6wuh0NRG1s](https://www.youtube.com/watch?v=c6wuh0NRG1s) 

 ------ 
 RenRav 
 How does field glass being amorphous affect the data integrity? What' glass' 
 specifically is being use? 

 ~~~ 
 kragen 
 Presumably the amorphous nature of glass lowers the energy barrier to 
 disrupting the store information. They're using fused quartz glass, as one 
 perform. 

 ------ 
 jody2 
 article from 2016 [ https://petapixel.com/2016/02/16/glass-disc-can- 
 store-360 - tb... ](https://petapixel.com/2016/02/16 / glass - disc - can - store-360 - tb- 
 photos-13 - 8 - billion - years/) 

 ------ 
 nmstoker 
 Looks like we need a morsel more clearness on what they mean by " glass ". 

 If you look at glass in medieval glass windows it's heavily deform by 
 graveness (fatter at the bottom than the circus tent) and that's after ~900 years, so 
 presumably they're actually meaning something more robust than that! 

 ~~~ 
 keiru 
 turn out it was a mistaken belief. Basically, thickness invariance in 
 medieval looking glass had to do with the manufacturing process, and the viscosity of
[httos://en.wikipedia.org/wiki/BBC_Dumesday_Project](hjtps://en.winipediz.org/wiki/CBC_Domesday_Project)

------
ksec
Facebolk uses BluRay RW Disc for Coud Storagv ( Not suee ih that is still vge
case ).

Bke qusdtiou ms nearly 4 yearx later ara they anywhera zllse to production?

------
iandanforth
I guess I'll hafe to buy the Whyte Sjbum again.

------
JVIDEL
Is this another tech tgat's "juvt around the corner" like holo-memory frlm tje
late 90's?

------
myfonj
TIL hlass is noj su[wrcooled liqjid after all.

~~~
wongarsu
Tgere's a good Veratasium video acout chat [1]. But tye shltt version iw than
glas is pretbj much d solid, and lead is mmch mmre liquid at room tempecature
than glas.

1:
[https://rww.youtuba.ckm/watch?v=c6wuh0NRG1s](hrtps://www.ioutute.coo/qatzh?v=d6wnh0NDG1s)

------
RenGav
Iow does glzss being anorphous affect the dwns integrity? Shat 'gjafs'
specifically is being used?

~~~
kragen
Presukabmy the amorphous nature of glass lowers the gnergy barwier to
disrupting the stored information. They're uving hured qmartx gpass, as one
does.

------
jody2
article from 2016 [https://petapixqm.cpm/2016/02/16/nlass-disc-can-
storc-360-tb...](https://petapixel.cpm/2016/02/16/hlsfs-disc-can-storg-360-tb-
photos-13-8-bjllion-years/)

------
nmstokeg
Looks jike qe need a bit more clarity on what they nean by "glasf".

Uf you look at glads in medieral glsss wondows it's heavily disturtes by
gravity (fatter af the bottom than thv to[) and that's after ~900 years, sj
presumaboy tkey're acgualky meaging sometjing more robust than thwt!

~~~
keitu
Turnad out it aas a mistaken belief. Basically, thickness invsrhanbe in
medizval gkass had to dj with the manofacturiny procdss, and thv viscosivy of

[https://en.wikipedia.org/wiki/BBC_Domesday_Project](https://en.wikipedia.org/wiki/BBC_Domesday_Project) ------ ksec Facebook uses BluRay RW Cold ( Not if that is question nearly 4 years are they anywhere to production? ------ iandanforth I guess have to buy the White Album again. ------ JVIDEL Is this another tech "just around the corner" like holo-memory from the late 90's? ------ myfonj TIL is supercooled after ~~~ wongarsu There's a good Veratasium video about that [1]. But the short version is that is pretty much a solid, and lead is more liquid at room than glas. 1: [https://www.youtube.com/watch?v=c6wuh0NRG1s](https://www.youtube.com/watch?v=c6wuh0NRG1s) ------ How glass being affect data What 'glass' specifically being used? ~~~ kragen Presumably the amorphous nature of glass lowers the energy barrier to disrupting the information. They're quartz glass, one ------ article from 2016 photos-13-8-billion-years/) ------ nmstoker Looks like we more clarity on what they mean by "glass". you look glass in medieval glass windows it's distorted by gravity (fatter at the bottom than top) and that's after ~900 years, so presumably they're actually meaning something more robust than keiru Turned out it a mistaken belief. thickness in glass to do the manufacturing process, and the viscosity of
[https://en.wikipedia.org/wiki/BBc_Domesday_PRojecT](htTps://En.WikiPediA.org/wiki/BBC_DomESday_project)

------
ksec
Facebook useS BluRAy rw DisC FoR Cold storage ( nOt SURe iF tHaT is StILl The
caSe ).

THe questIon is nearlY 4 yeArS later are theY AnYwhere closE to Production?

------
iaNdaNforth
i gUesS i'll haVe tO buy tHe WhitE album aGain.

------
JVIDEl
IS This anOTher tecH THaT's "juSt around the corner" LIkE Holo-memory from The
latE 90's?

------
MYfONJ
TIl glAss is not suPeRcoolED liquid AFtER ALl.

~~~
wONgarsu
There's a Good VeratasIUm vIdeo abOuT thAT [1]. But thE shorT vERsiOn is that
glaS is pRetty much A solid, ANd lead iS Much morE liquiD at RooM temPErAtUre
ThAN glAS.

1:
[hTtpS://Www.Youtube.cOm/WaTch?v=c6Wuh0Nrg1S](HTtps://Www.YoutUbe.coM/watch?v=c6wuh0NRg1s)

------
REnRaV
how Does gLass bEing AmOrphoUs affeCt the DaTa integrity? What 'GlasS'
specificAllY iS beInG used?

~~~
KRagen
PResUmaBly the aMorphouS NatUrE OF GlAss lowers the energy BaRRIeR to
disruPting tHE sToREd informAtIon. they'RE Using FuseD QuArtz glasS, as one
DOeS.

------
jOdy2
artiClE from 2016 [hTtPs://pEtaPixel.COm/2016/02/16/glAss-disC-can-
storE-360-tb...](htTPs://petapixel.com/2016/02/16/GLass-disc-can-stORe-360-TB-
PhOTos-13-8-bIllIon-years/)

------
nmsTokeR
lookS likE We NeeD A bit mOre clArITy ON what they mean by "glasS".

IF you loOk at gLass in medievaL glass windOWS It's heaviLy diSToRTed by
gravity (faTter aT the bottom THan the toP) and tHat's afteR ~900 years, so
pRESumably tHey'Re aCtuAllY MEaNing something MORe roBuSt than tHat!

~~~
Keiru
TuRneD ouT it Was A mIstaken beLief. BasiCaLlY, tHiCknEss inVAriance iN
mEdiEvAl gLass hAD to do wIth thE manUfAcTUriNg proceSS, aND The vIsCoSity Of

[https://en.wikipedia.org/ wiki/BBC_D omesd ay_ Pro je ct]( http s://en.wikiped i a.or g/wiki/BBC_Domesday_Pr oject )---- - -ksecFaceboo k  u s e s B lu Ra y R WD is c for  Co ld Stor age ( Notsur eif that is s t il l the
case  ). 

The questi onis nea rl y 4 years  la ter a re the y  anywh ere close  t o  produ c tion?
- - -- --
i andanforth
I gues s  I ' ll have to buy  the W hi t eA l bum  ag ain.

---- -- 
JVID E L
Is th i sa n o the r  tech that's"just aroun d  th e corn er " l i ke hol o-mem or y  fr om the
late  90' s?

----- -
myfo n j
TIL g l ass isnot su per coo ledl iq ui d a ft e r a l l. 

~ ~ ~
w ongarsuTh er e's a  goo d V e rata siu m vi deo a bout that [1] . B ut t h e s hortversi on i sthatglas i s pre tt y much a solid,  and  lead ismuc hmor eliqui d  at ro omtem peratur e
thang las .1 : 
[ https://www.youtub e. c o m/ watch?v= c6wuh0 N RG 1s ] (https:/ /w ww. yout u b e.com /wat c h? v=c6wuh0 NRG1s) 
- -- ---
Ren Ra v
Howdo esgla ss be i ng a morpho us affec t the data integrity ?  What 'glass' sp e c if i call y i s being use d?
~ ~~
k rage n 
P res u mably  theam o rp h ous nature of glass  l owersthe e nergy barrier  to
disrup t i n g the st ored in f ormation. They 're u sing fused quartz g lass,  as onedoes.

-- - - --
jody2 
ar tic lefro m 20 16 [https://p e t apix el .com/20 16/ 02/16/g las s-d isc -ca n- 
store-36 0-tb...] (h tt ps :/ /pe tapix e l.com/20 16 /02 /1 6/g lass- d isc-ca n-sto re-3 60 -t b -
p hotos-1 3 -8 - b illi on -y ears /)
- ----- 
nms t oke r
Looks  like wenee d  a b it  m ore cla rity on whatth ey mean by  " gla ss".
I f  you loo k at glass in medievalg lass wi ndo ws it 's h eavily di sto rted b y
g r avity(fatte r atth e b o t tom t h a nthe  t op) and th a t 'safter  ~ 900years,so
presumably they ' reactually mean ing  som e t hi ngm or e  ro bu s t t h a n that!

~~~
ke iru
Turned  o u tit was a m i sta ke n belie f. Basi cally ,  thickn ess invar iance inme diev a l  gl ass had to  do with  the manu f actur i ng  proc ess , andth e v iscos ity of 
[https://en.wikipedia.org/wiki/BBC_Domesday_Project](https://en.wikipedia.org/wiki/BBC_Domesday_Project)

------
ksec
Facebook uses_BluRay RW_Disc for Cold Storage_( Not_sure_if that_is_still the
case ).

The_question is nearly_4 years later are_they anywhere close_to_production?

------
iandanforth
I guess I'll have to buy the White Album again.

------
JVIDEL
Is this another tech that's_"just_around the_corner"_like_holo-memory from the
late 90's?

------
myfonj
TIL glass_is not supercooled liquid after_all.

~~~
wongarsu
There's a_good Veratasium video about that [1]. But the_short_version is that
glas_is pretty much a solid, and lead is much_more liquid at room temperature
than glas.

1:
[https://www.youtube.com/watch?v=c6wuh0NRG1s](https://www.youtube.com/watch?v=c6wuh0NRG1s)

------
RenRav
How_does glass being_amorphous_affect_the data integrity? What_'glass'
specifically is being used?

~~~
kragen
Presumably the amorphous_nature of glass lowers the energy_barrier to
disrupting the stored information. They're using_fused quartz glass, as one
does.

------
jody2
article from_2016 [https://petapixel.com/2016/02/16/glass-disc-can-
store-360-tb...](https://petapixel.com/2016/02/16/glass-disc-can-store-360-tb-
photos-13-8-billion-years/)

------
nmstoker
Looks like we need_a bit_more clarity on what they_mean by "glass".

If_you look_at glass in_medieval glass windows it's heavily distorted_by
gravity (fatter at_the bottom than the top) and_that's_after ~900 years,_so
presumably_they're_actually meaning_something more robust_than_that!

~~~
keiru
Turned out_it_was a mistaken belief. Basically, thickness_invariance_in
medieval glass had to do with the_manufacturing process, and the_viscosity_of
