Oh noes teh sky is falling!

[stonesfan129]

I'm not worried. I've got CDs that are 35+ years old that still play fine. Take care of them and they will last.

[Agent Kay]

Well, my twice watched UK EIV disc of Book of Eli won't load in a ps4 pro, Xbox one X or my 4k spinner

[Anthony P]

Originally Posted by alchav21

Do any of you guys know how many Disc Factories are left? I don't think each Studio has their own. I heard in North America there were two left. Of course each Studio has to make their own Digital Master for a particular Disc.

Studios never had their own factories.

[tomtastic]

I've got some Disco Vision discs from 1978 that still play, a little disc rot sparkling but can still view them. That's about 42 years.

The worst I've seen are WB HD DVD's. I've got a stack of those I need to recycle that went bad. Some went bad early. Some went bad between 2017 and 2020.

[Vilya]

I should hope to last as long as my discs will.

[chriscreep23]

Here's is an interesting article. What do you guys think of it?

https://itsastampede.com/2020/03/30/...-do-dvds-last/

[mdo7]

Originally Posted by chriscreep23

This article may prove you wrong.Here's a a study/stress test that someone on this site posted yesterday. The article made me more worried about the stability and longevity of blu-rays. The guy actually performed stress tests under certain conditions and blu-rays rated very poorly. In fact if you look at table 5, single layer read-only blu-rays scored even poorly than single layer read-only DVDs which means that even read-only DVDs have higher longevity than read-only blu-rays. In this study read-only CDs seem to last longer that read-only blu rays. I don't know if it is true.

"The most recent generation of optical disc media available is the Blu-ray format. Blu-rays offer significantly more storage capacity than compact discs (CDs) and digital versatile discs (DVDs) and thus are an attractive option for the storage of large image or audio and video files. However, uncertainty exists on the stability and longevity of Blu-ray discs and the literature does not contain much information on these topics. In this study, the stabilities of Blu-ray formats such as read-only movie discs as well as many different brands of recordable and erasable media were evaluated. Testing involved the exposure of samples to conditions of 80 °C and 85 % relative humidity for intervals up to 84 days. Overall, the stability of the Blu-ray formats was poor with many discs significantly degraded after only 21 days of accelerated ageing. In addition to large increases in error rates, many discs showed easily identifiable visible degradation in several different forms. In a comparison with other optical disc formats examined previously, Blu-ray stability ranked very low. Other data from the study indicated that recording Blu-ray media with low initial error rates is challenging for some brands at this time, which is a factor that ultimately affects longevity."

https://www.semanticscholar.org/pape...68bd1c8d6663ab

Wait a minute, I don't see any table or any "table 5" you're showing me. That link you give me doesn't work or won't access when I clicked on it. Can you give me other evidence or another URLs that backed up whatever you stated.

[chriscreep23]

Originally Posted by mdo7

Wait a minute, I don't see any table or any "table 5" you're showing me. That link you give me doesn't work or won't access when I clicked on it. Can you give me other evidence or another URLs that backed up whatever you stated.

Here you are

https://www.semanticscholar.org/pape...68bd1c8d6663ab

[mdo7]

Originally Posted by chriscreep23

Here you are

https://www.semanticscholar.org/pape...68bd1c8d6663ab

Here's the problem with the studies. One is that this report is from 2018 (one of my article source was from last year that kinda doesn't match with the statistic), and I can't access the rest of the report you give to me because I would need to pay $42 to read the whole research (which I'm not going to waste money and time for).

Also, several of my blu-rays I had in my collections I had kept for years hasn't shown sign of deterioration or neither had a problem playing on my BD player (I tested them on my 2 BD players, my PS3, and my PS4 Pro). No problem playing back on them since I kept them stored in room temperature.

Other then that, I haven't seen any other report of mass BD deterioration or BD disc rot.

[mdo7]

As of now, I haven't seen any article or evidence of mass BD deterioration or a mass disc rot involving BD.

Does anybody know when Sony (and to greater extent, Blu-ray Disc Association) planned and developed blu-ray before it became a mainstream format standard, did they ever had plans for preventing/combatting disc rot and deterioration? I want to know because if blu-ray disc come with measure to combat disc rot and deterioration, then that disc standard is way better CDs and DVDs when it comes to disc rot and deterioration.

[johndoyle123]

Originally Posted by chriscreep23

Here's is an interesting article. What do you guys think of it?

https://itsastampede.com/2020/03/30/...-do-dvds-last/

I think you need to chill out

Since this I’ve read many other studies online which I paid for, I have had emails with data archivists and spoken with others i the know (who worked for Panasonic) and there is no evidence of any wide spread disc rot, aside from known production issues that have caused bad batches.

There are also no realistically circumstances to put discs through any form of stress test like real world tests.

Replicated media is designed to last up to 100 years + was the basic concluding

[mdo7]

Originally Posted by johndoyle123

I think you need to chill out

Since this I’ve read many other studies online which I paid for, I have had emails with data archivists and spoken with others i the know (who worked for Panasonic) and there is no evidence of any wide spread disc rot, aside from known production issues that have caused bad batches.

There are also no realistically circumstances to put discs through any form of stress test like real world tests.

Replicated media is designed to last up to 100 years + was the basic concluding

Well there's another reason blu-ray won't really rot. DVD use aluminum reflective layer, right. Aluminum rust and decompose over time, am I correct?

Blu-ray doesn't use aluminum, they used silver alloy over aluminum. So using silver over aluminum for blu-ray is probably the reason why disc rot isn't common on blu-ray.

[ThanatosPT]

Originally Posted by mdo7

Well there's another reason blu-ray won't really rot. DVD use aluminum reflective layer, right. Aluminum rust and decompose over time, am I correct?

Blu-ray doesn't use aluminum, they used silver alloy over aluminum. So using silver over aluminum for blu-ray is probably the reason why disc rot isn't common on blu-ray.

But silver oxidizes too.

[chriscreep23]

Originally Posted by johndoyle123

I think you need to chill out

Since this I’ve read many other studies online which I paid for, I have had emails with data archivists and spoken with others i the know (who worked for Panasonic) and there is no evidence of any wide spread disc rot, aside from known production issues that have caused bad batches.

There are also no realistically circumstances to put discs through any form of stress test like real world tests.

Replicated media is designed to last up to 100 years + was the basic concluding

That guy however did not put his DVDs under extreme environmental conditions but they degraded nonetheless

[mdo7]

Originally Posted by ThanatosPT

But silver oxidizes too.

I did some research and yeah you're correct. But it looks like it doesn't cause a serious problem for BD (then again, some stories of disc rot or BD not playing back on players varies differently). So I can't jump to any conclusion for now. Need more research and evidence to make a good conclusion about BD disc rot.

[neo_reloaded]

Originally Posted by chriscreep23

This article may prove you wrong.Here's a a study/stress test that someone on this site posted yesterday. The article made me more worried about the stability and longevity of blu-rays. The guy actually performed stress tests under certain conditions and blu-rays rated very poorly. In fact if you look at table 5, single layer read-only blu-rays scored even poorly than single layer read-only DVDs which means that even read-only DVDs have higher longevity than read-only blu-rays. In this study read-only CDs seem to last longer that read-only blu rays. I don't know if it is true.

"The most recent generation of optical disc media available is the Blu-ray format. Blu-rays offer significantly more storage capacity than compact discs (CDs) and digital versatile discs (DVDs) and thus are an attractive option for the storage of large image or audio and video files. However, uncertainty exists on the stability and longevity of Blu-ray discs and the literature does not contain much information on these topics. In this study, the stabilities of Blu-ray formats such as read-only movie discs as well as many different brands of recordable and erasable media were evaluated. Testing involved the exposure of samples to conditions of 80 °C and 85 % relative humidity for intervals up to 84 days. Overall, the stability of the Blu-ray formats was poor with many discs significantly degraded after only 21 days of accelerated ageing. In addition to large increases in error rates, many discs showed easily identifiable visible degradation in several different forms. In a comparison with other optical disc formats examined previously, Blu-ray stability ranked very low. Other data from the study indicated that recording Blu-ray media with low initial error rates is challenging for some brands at this time, which is a factor that ultimately affects longevity."

https://www.semanticscholar.org/pape...68bd1c8d6663ab

This study is subjecting discs to torture chambers and then acting like their failure is surprising. 84 days of 176 degree Fahrenheit conditions, yeah that'll certainly damage your discs!

[Lee A Stewart]

Report: Pre-Pandemic Consumer Movie Spending Won’t Return Until 2023

https://www.mediaplaynews.com/report...rn-until-2023/

[Lee A Stewart]

ULTRA HD BLU-RAY PLAYER SALES DECLINE DESPITE PANDEMIC SHELTERING

https://hdguru.com/ultra-hd-blu-ray-...ic-sheltering/

[Lee A Stewart]

ULTRA HD BLU-RAY PLAYER SALES DECLINE DESPITE PANDEMIC SHELTERING

https://hdguru.com/ultra-hd-blu-ray-...ic-sheltering/

[Lee A Stewart]

Originally Posted by Steedeel

I stated clearly I wasn’t talking about this thread. You are a trouble maker. You have been since you joined. Your latest post has infected two threads already, both off topic and both trolling in my opinion. It needs to stop.

Nothing else to say to you.

The day I listen to you is the day I drop dead. I don't listen to liars ever. I haven't forgot you denying you made a post which you did, then edited/deleted in this very thread.