IDM Mailing Archive

anyone out there have experience with disc rot, please email off list. Thanks, sorry for the cross post, Peter

On Tuesday 28 January 2003 16:19, thorsten Sideb0ard wrote:

quoted 4 lines This is something i try not to think about,

> This is something i try not to think about, > but has been a nagging worry at the back of my mind, > as i'm sure i heard something about that years back > when the cd was first introduced.

I'm not sure if it counts as disc rot, but I have a double CD album (The Orb - Live 93) that slowly became unplayable despite being kept well, in their original jewel case. What happened with these CDs is that the dye label (which covered the whole of the label side) started flaking off, taking the reflective aluminium layer underneath with it. Eventually I ended up with just a couple of clear discs of polycarbonate, all the data still on them, but completely unreadable by anything. As an experiment I sprayed the label side with silver paint and tried to rip the audio with cdparanoia (if you were using Windows I expect EAC would work)... and it worked! There were a heap of minor read errors but nothing that cdparanoia couldn't fix. It sounded dreadful when playing in my CD player, but the data was off it, so I binned it and burned it to CDR. Which is great, at least for the next 10 years or so until significant amounts of the recording dye migrate back to their original state, when I'll have to salvage the audio all over again. -- marm --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

K - here you be : Disc rot (from what I gather) is a mfg. defect in CD pressing wherein the CD becomes "bronzed" at the edges and produces static-like noise when played. It's apparently cause by aluminum oxidation in the media and can't be rectified - only replaced. It's more common in laser discs but has happened in CDs as well. jeff http://www.brainwashed.com/c93/discog/discrot.html http://www.foetus.org/misc/rot.html http://www.hyperion-records.co.uk/ (looks like most "help" infos are about replacement) http://foetusized.org/cdrot.html http://www.mv.com/ipusers/richbreton/m/files/cd_rot.htm http://www-personal.umich.edu/~bpl/cdrot.htm At 10:19 AM 1/28/2003, thorsten Sideb0ard wrote:

quoted 1 line i'd quite like to see replies on list as well.

>i'd quite like to see replies on list as well.

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I'm under the impression that disc rot has only occurred on CDs manufactured by PDO in th 80's and early 90's due to a manufacturing error, i.e. it's not something that we generally have to worry about. However, entropy is a whole 'nother issue. -marco

quoted 37 lines K - here you be :

> K - here you be : > > Disc rot (from what I gather) is a mfg. defect in CD pressing wherein the > CD becomes "bronzed" at the edges and produces static-like noise when > played. It's apparently cause by aluminum oxidation in the media and can't > be rectified - only replaced. > It's more common in laser discs but has happened in CDs as well. > > jeff > > http://www.brainwashed.com/c93/discog/discrot.html > > http://www.foetus.org/misc/rot.html http://www.hyperion-records.co.uk/ > (looks like most "help" infos are about replacement) > > http://foetusized.org/cdrot.html > > http://www.mv.com/ipusers/richbreton/m/files/cd_rot.htm > > http://www-personal.umich.edu/~bpl/cdrot.htm > > > > > > > At 10:19 AM 1/28/2003, thorsten Sideb0ard wrote: > > > >i'd quite like to see replies on list as well. > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org > For additional commands, e-mail: idm-help@hyperreal.org >

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quoted 5 lines I'm under the impression that disc rot has only occurred on CDs

>I'm under the impression that disc rot has only occurred on CDs >manufactured by PDO in th 80's and early 90's due to a manufacturing >error, i.e. it's not something that we generally have to worry about. > >However, entropy is a whole 'nother issue.

I have some CD-rs that have disc rot. Old Maxell discs (well, old being from '99-'00 or so. Not very old). The edges are changing color and the foil-stuff is fading away from the edges. The most notable one is a copy of Windows 98, so the content may have something to do with it :) Anyway, it gave me a good reason to hate cheap maxell Cd-rs, which isn't that hard to do but now I can justify it. So it's not just PDO CD's, but some crappy CD-r's, too. Luckily they still read, but the data on the edge is lost. derek -- eggytoast.com -------------- commerce soon: eggtastic.com --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

quoted 3 lines I'm under the impression that disc rot has only occurred on CDs

>I'm under the impression that disc rot has only occurred on CDs >manufactured by PDO in th 80's and early 90's due to a manufacturing >error, i.e. it's not something that we generally have to worry about.

Yes, that's what I heard. I have some discs by PDO from that era, that visually appear to be deteriorating. Though they do seem to play OK. Maybe the error rate is not bad enough to cause noticeable problems. I remember hearing that the bleach used in some cardboard sleeves can sometimes cause deterioration in the lacquer on the label side. clic --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

On Tue, 28 Jan 2003, clic wrote: :>I'm under the impression that disc rot has only occurred on CDs of course if you live in belize you also have to contend with eating fungi <they like the shiny bits.> http://news.bbc.co.uk/1/hi/sci/tech/1402533.stm b. --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

Whats an easy way to get aluminum to oxidize? That sounds like something that would produce some interesting samples if used sparingly...do you people know of any chemical reactants I can use to cause this to happen? Pats

quoted 9 lines Disc rot (from what I gather) is a mfg. defect in CD pressing wherein the

> >Disc rot (from what I gather) is a mfg. defect in CD pressing wherein the >CD becomes "bronzed" at the edges and produces static-like noise when >played. It's apparently cause by aluminum oxidation in the media and can't >be rectified - only replaced. >It's more common in laser discs but has happened in CDs as well. > >jeff >

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quoted 5 lines Whats an easy way to get aluminum to oxidize? That sounds like

>Whats an easy way to get aluminum to oxidize? That sounds like >something that would produce some interesting samples if used >sparingly...do you people know of any chemical reactants I can use >to cause this to happen? >

oxygen! (oxidize? hehe) Aluminum loves oxygen. Nearly all aluminum around has a thin layer of aluminum oxide on it that protects it from further oxidation. Even aluminum foil has that thin layer. That's also why clog cleaner stuff (like The Works) helps make "bombs." It'll corrode through the aluminum oxide to the pure aluminum and "explode." anyway, you don't need to worry about oxidizing aluminum, you need to worry about getting rid of that aluminum oxide. Clog cleaner, nail polish remover, or any similar chemical compound will eat through it. But you need to do it *extremely* sparingly, as even a full drop can render the disc unreadable. A pipette would help for sure. of course, the results would likely end up sounding just like a skipping CD, as a gap in the data is a gap regardless of how it got there. I'd say just scratch the thing. derek -- eggytoast.com -------------- commerce soon: eggtastic.com --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

From: "EggyToast"

quoted 10 lines I have some CD-rs that have disc rot. Old Maxell discs (well, old

> I have some CD-rs that have disc rot. Old Maxell discs (well, old > being from '99-'00 or so. Not very old). The edges are changing > color and the foil-stuff is fading away from the edges. The most > notable one is a copy of Windows 98, so the content may have > something to do with it :) > Anyway, it gave me a good reason to hate cheap maxell Cd-rs, which > isn't that hard to do but now I can justify it. So it's not just PDO > CD's, but some crappy CD-r's, too. Luckily they still read, but the > data on the edge is lost. > derek

Green- or red-magic marker around the edge of the disc will help: some will say that is a myth, however it has been effective in rescuing sketchy discs that I've markered that way. HTH .o0O}seeklektek{O0o. --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

From: "b.phenix"

quoted 2 lines On Tue, 28 Jan 2003, clic wrote:

> On Tue, 28 Jan 2003, clic wrote: > :>I'm under the impression that disc rot has only occurred on CDs

quoted 4 lines of course if you live in belize you also have to contend with

> of course if you live in belize you also have to contend with > eating fungi <they like the shiny bits.> > http://news.bbc.co.uk/1/hi/sci/tech/1402533.stm > b.

Belize me, that is a good thing: http://www.salon.com/tech/feature/2002/11/25/mushrooms/ ""Fungi are the grand recyclers of the planet and the vanguard species in habitat restoration," says Stamets, who predicts that bioremediation using fungi will soon be a billion-dollar industry. "If we just stay at the crest of the mycelial wave, it will take us into heretofore unknown territories that will be just magnificent in their implications."" http://www.fungi.com/mycotech/index.html .o0O}seeklektek{O0o. --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

On Tuesday, January 28, 2003, at 03:28 PM, seeklektek wrote:

quoted 9 lines

> > http://www.salon.com/tech/feature/2002/11/25/mushrooms/ > ""Fungi are the grand recyclers of the planet and the vanguard species > in habitat restoration," > says Stamets, who predicts that bioremediation using fungi will soon > be a billion-dollar industry. > "If we just stay at the crest of the mycelial wave, it will take us > into heretofore unknown > territories that will be just magnificent in their implications.""

here's to mushrooms that make us double in size, and flowers that make us spit fireballs. --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

From: "Brett Dietsch"

quoted 9 lines On Tuesday, January 28, 2003, at 03:28 PM, seeklektek wrote:

> On Tuesday, January 28, 2003, at 03:28 PM, seeklektek wrote: > > http://www.salon.com/tech/feature/2002/11/25/mushrooms/ > > ""Fungi are the grand recyclers of the planet and the vanguard species > > in habitat restoration," > > says Stamets, who predicts that bioremediation using fungi will soon > > be a billion-dollar industry. > > "If we just stay at the crest of the mycelial wave, it will take us > > into heretofore unknown > > territories that will be just magnificent in their implications.""

quoted 2 lines here's to mushrooms that make us double in size, and flowers that make

> here's to mushrooms that make us double in size, and flowers that make > us spit fireballs.

Yay! Akira! =) http://www.johnefrem.com/manga/akira/immagini/tetsuo.jpg (Mashroom Studios ;)) .o0O}seeklektek{O0o. --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

quoted 19 lines From: "Brett Dietsch"

>From: "Brett Dietsch" >> On Tuesday, January 28, 2003, at 03:28 PM, seeklektek wrote: >> > http://www.salon.com/tech/feature/2002/11/25/mushrooms/ >> > ""Fungi are the grand recyclers of the planet and the vanguard species >> > in habitat restoration," >> > says Stamets, who predicts that bioremediation using fungi will soon >> > be a billion-dollar industry. >> > "If we just stay at the crest of the mycelial wave, it will take us >> > into heretofore unknown >> > territories that will be just magnificent in their implications."" > > >> here's to mushrooms that make us double in size, and flowers that make >> us spit fireballs. > > >Yay! Akira! =) >http://www.johnefrem.com/manga/akira/immagini/tetsuo.jpg >(Mashroom Studios ;))

err, yay super mario brothers? :P NO ONE POST THAT STUPID VIDEO GAME "darkened room pills etc" FAKE QUOTE!! AAAHAHGHGH! DEREK -- eggytoast.com -------------- commerce soon: eggtastic.com --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

On Tuesday, January 28, 2003, at 04:12 PM, EggyToast wrote:

quoted 6 lines Yay! Akira! =)

>> >> Yay! Akira! =) >> http://www.johnefrem.com/manga/akira/immagini/tetsuo.jpg >> (Mashroom Studios ;)) > > err, yay super mario brothers? :P

so, on that salon story.. an ex girlfriend of mine moved to washington a while ago, where aparently, lots and lots and lots of different mushrooms grow. some of them dont grow anywhere else in the world. she kept going on and on about the healing properties in some of them, and how they were beneficial to the world. cures for diseases, ways to fix polluted soil, etc.. then she tells me that psilocybian mushrooms are really, really, really common out there. so, that makes me wonder.. how do you decide if a mushroom will fix polluted soil? eat one, then start staring at another from the same batch? i wanna spit fireballs.. :-(

quoted 2 lines NO ONE POST THAT STUPID VIDEO GAME "darkened room pills etc" FAKE

> NO ONE POST THAT STUPID VIDEO GAME "darkened room pills etc" FAKE > QUOTE!! AAAHAHGHGH!

HAR HAR THEY'S TALKIN BOUT E!!! THAT IS HUMOR!! JUST LIKE MONKEYS!! --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

quoted 16 lines so, on that salon story..

>so, on that salon story.. > >an ex girlfriend of mine moved to washington a while ago, >where aparently, lots and lots and lots of different >mushrooms grow. some of them dont grow anywhere else in >the world. she kept going on and on about the healing >properties in some of them, and how they were beneficial >to the world. cures for diseases, ways to fix polluted >soil, etc.. > >then she tells me that psilocybian mushrooms are really, >really, really common out there. > >so, that makes me wonder.. how do you decide if a >mushroom will fix polluted soil? eat one, then start >staring at another from the same batch?

In Texas, lotsa people are into (if into drugs) going out and looking for the mushrooms on cowshit in pastures. Reason being they're likely to be the right kind of shrooms.

quoted 1 line i wanna spit fireballs.. :-(

>i wanna spit fireballs.. :-(

I'd settle for a Tanooki suit. PS: Shop at Nookington's. LOLOLOLOL! --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

O>err, yay super mario brothers? :P

quoted 3 lines NO ONE POST THAT STUPID VIDEO GAME "darkened room pills

> >NO ONE POST THAT STUPID VIDEO GAME "darkened room pills >etc" FAKE QUOTE!! AAAHAHGHGH!

PS: LOLOLOLOLOL I understand sunflowers are good for bioremediation as well. I'm planting some in my front yard in March. :) --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org

From: "Brett Dietsch" <elph@lawngnome.org>

quoted 6 lines On Tuesday, January 28, 2003, at 04:12 PM, EggyToast wrote:

> On Tuesday, January 28, 2003, at 04:12 PM, EggyToast wrote: > >> Yay! Akira! =) > >> http://www.johnefrem.com/manga/akira/immagini/tetsuo.jpg > >> (Mashroom Studios ;)) > > > > err, yay super mario brothers? :P

Yeah, them too. ;)

quoted 9 lines so, on that salon story..

> so, on that salon story.. > an ex girlfriend of mine moved to washington a while ago, where > aparently, lots and lots and lots of different mushrooms grow. some of > them dont grow anywhere else in the world. she kept going on and on > about the healing properties in some of them, and how they were > beneficial to the world. cures for diseases, ways to fix polluted > soil, etc.. > then she tells me that psilocybian mushrooms are really, really, really > common out there.

Psilocybes: (~sill-laas-ah-bees~) http://www.fungi.com/info/gallery/gallery1.html When the rains come, in the fall, or so I've heard: http://www.mushroomjohn.com/news8a.htm

quoted 3 lines so, that makes me wonder.. how do you decide if a mushroom will fix

> so, that makes me wonder.. how do you decide if a mushroom will fix > polluted soil? eat one, then start staring at another from the same > batch?

That's not a bad idea. ;) What time's lunch?

quoted 1 line i wanna spit fireballs.. :-(

> i wanna spit fireballs.. :-(

I *guarantee* that these will 'work': http://snurl.com/o5c .o0O}seeklektek{O0o. --------------------------------------------------------------------- To unsubscribe, e-mail: idm-unsubscribe@hyperreal.org For additional commands, e-mail: idm-help@hyperreal.org