Re: Techie cd/dvd question

S
Posted By
SCRUFF
Jan 20, 2005
Views
314
Replies
20
Status
Closed
"broga" wrote in message
This question refers to cds/dvds burned in a home/business computer.
I have a lot of PS stuff stored on cd. When a cd fails it seems to be the most used files that get corrupted first.
Do you find that READING data frequently from a cd/dvd causes that data to eventually become unreadable ?

I have this theory that the reading laser microscopically softens the data layer with each pass until the data eventually becomes unreadable – in
much
the same way that things frequently exposed to sunlight tend to ‘age’
faster
than things not so exposed.

If this is true do re-recordable media suffer more than the single use version

Does anybody have any data on this ?

www.micromountain.com
http://www.breadnmolasses.com/atlantictech/id82.html

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H
Hecate
Jan 21, 2005
On Thu, 20 Jan 2005 12:19:20 -0500, "Scruff" wrote:

"broga" wrote in message
This question refers to cds/dvds burned in a home/business computer.
I have a lot of PS stuff stored on cd. When a cd fails it seems to be the most used files that get corrupted first.
Do you find that READING data frequently from a cd/dvd causes that data to eventually become unreadable ?

I have this theory that the reading laser microscopically softens the data layer with each pass until the data eventually becomes unreadable – in
much
the same way that things frequently exposed to sunlight tend to ‘age’
faster
than things not so exposed.

If this is true do re-recordable media suffer more than the single use version

Does anybody have any data on this ?

www.micromountain.com
http://www.breadnmolasses.com/atlantictech/id82.html

But if you prefer a more informed and skeptical view:

http://www.mrichter.com/cdr/primer/durable.htm

And then there’s personal experience:

http://www.detnews.com/2004/techcolumns/0409/01/technology-2 59970.htm

Then there’s this guide from the US National Institute of Standards and Technology:

http://www.itl.nist.gov/div895/carefordisc/disccare.html

and this article is a really good round up including the PCActive tests which found CDs having a 2 year lifespan:

http://www.informationweek.com/story/showArticle.jhtml?artic leID=15800263



Hecate – The Real One

veni, vidi, reliqui
S
Stephan
Jan 21, 2005
Hecate wrote:

But if you prefer a more informed and skeptical view:

http://www.mrichter.com/cdr/primer/durable.htm

And then there’s personal experience:

http://www.detnews.com/2004/techcolumns/0409/01/technology-2 59970.htm
Then there’s this guide from the US National Institute of Standards and Technology:

http://www.itl.nist.gov/div895/carefordisc/disccare.html
and this article is a really good round up including the PCActive tests which found CDs having a 2 year lifespan:

http://www.informationweek.com/story/showArticle.jhtml?artic leID=15800263

Want to see some less than 5 year old CDs? 😉
So tired of people recommending them as safe storage I had to finally shoot 4 of the ones I keep around to show my friends. The pictures are not up to my standards but they’ll do the job.
http://s94713401.onlinehome.us/CD%20decay/pages/2.htm
or
http://tinyurl.com/4wx8d
(Warning: 1000 px images)
The blue and green disks are from a game produced by Microsoft (!) and the one with the fonts is a music CD.
The other one is a home burned TDK about two years old and stored in a sleeve inside a folder
Hope Scruff will take time to come see them, of course he will accuse me of using my CDs to spread PB&J on my kids’ sandwiches…

Stephan
M
MOP
Jan 21, 2005
Want to see some less than 5 year old CDs? 😉
So tired of people recommending them as safe storage I had to finally shoot 4 of the ones I keep around to show my friends. The pictures are not up to my standards but they’ll do the job.
http://s94713401.onlinehome.us/CD%20decay/pages/2.htm
or
http://tinyurl.com/4wx8d
(Warning: 1000 px images)
The blue and green disks are from a game produced by Microsoft (!) and the one with the fonts is a music CD.
The other one is a home burned TDK about two years old and stored in a sleeve inside a folder
Hope Scruff will take time to come see them, of course he will accuse me of using my CDs to spread PB&J on my kids’ sandwiches…
Stephan

If your house/office is doing that to your CD’s I hate to think what it is doing to you and your kids health! do you live on a boat or in a tent or something
S
Stephan
Jan 21, 2005
MOP wrote:
Want to see some less than 5 year old CDs? 😉
So tired of people recommending them as safe storage I had to finally shoot 4 of the ones I keep around to show my friends. The pictures are not up to my standards but they’ll do the job.
http://s94713401.onlinehome.us/CD%20decay/pages/2.htm
or
http://tinyurl.com/4wx8d
(Warning: 1000 px images)
The blue and green disks are from a game produced by Microsoft (!) and the one with the fonts is a music CD.
The other one is a home burned TDK about two years old and stored in a sleeve inside a folder
Hope Scruff will take time to come see them, of course he will accuse me of using my CDs to spread PB&J on my kids’ sandwiches…
Stephan

If your house/office is doing that to your CD’s I hate to think what it is doing to you and your kids health! do you live on a boat or in a tent or something
Kind of, I live in Hawaii.
And don’t worry for us, the air is clean and the climate mild all year around 😉
R
RSD99
Jan 21, 2005
"Stephan" stated:
"…
Kind of, I live in Hawaii.
…."

And the average ambient humidity is something like 85% plus … ???

Any guesses as to just exactly "why" you are having problems … ???

Buy a de-humidifier for your storage cabinet.

"Stephan" wrote in message
Kind of, I live in Hawaii.
And don’t worry for us, the air is clean and the climate mild all year around 😉
S
Stephan
Jan 21, 2005
RSD99 wrote:
"Stephan" stated:
"…
Kind of, I live in Hawaii.
…"

And the average ambient humidity is something like 85% plus … ???

Not at all, 85% is Florida, not Hawaii.
http://www.prh.noaa.gov/hnl/pages/climate_summary.php
Any guesses as to just exactly "why" you are having problems … ???

I don’t have problems, I use CDs only for short time storage.
Buy a de-humidifier for your storage cabinet.
No, I buy external hard drives.

Stephan
S
SCRUFF
Jan 22, 2005
"Stephan" wrote in message
Hecate wrote:

But if you prefer a more informed and skeptical view:

http://www.mrichter.com/cdr/primer/durable.htm

And then there’s personal experience:

http://www.detnews.com/2004/techcolumns/0409/01/technology-2 59970.htm
Then there’s this guide from the US National Institute of Standards and Technology:

http://www.itl.nist.gov/div895/carefordisc/disccare.html
and this article is a really good round up including the PCActive tests which found CDs having a 2 year lifespan:
http://www.informationweek.com/story/showArticle.jhtml?artic leID=15800263

Want to see some less than 5 year old CDs? 😉
So tired of people recommending them as safe storage I had to finally shoot 4 of the ones I keep around to show my friends. The pictures are not up to my standards but they’ll do the job.
http://s94713401.onlinehome.us/CD%20decay/pages/2.htm
or
http://tinyurl.com/4wx8d
(Warning: 1000 px images)
The blue and green disks are from a game produced by Microsoft (!) and the one with the fonts is a music CD.
The other one is a home burned TDK about two years old and stored in a sleeve inside a folder
Hope Scruff will take time to come see them, of course he will accuse me of using my CDs to spread PB&J on my kids’ sandwiches…
Stephan
What on earth are you doing, spreading peanut butter on your kidssandwiches with those things?

Obviously, since these cd’s are from different sources and suffer the same fate, it can easily be attributed to improper storage. I have NEVER seen anything like that personally from my own collection, my associates or my friends.
What you are showing is the exception rather than the rule, and no doubt came from some jungle basement, lol.
S
SCRUFF
Jan 22, 2005
"Stephan" wrote in message
MOP wrote:
Want to see some less than 5 year old CDs? 😉
So tired of people recommending them as safe storage I had to finally shoot 4 of the ones I keep around to show my friends. The pictures are
not
up to my standards but they’ll do the job.
http://s94713401.onlinehome.us/CD%20decay/pages/2.htm
or
http://tinyurl.com/4wx8d
(Warning: 1000 px images)
The blue and green disks are from a game produced by Microsoft (!) and
the
one with the fonts is a music CD.
The other one is a home burned TDK about two years old and stored in a sleeve inside a folder
Hope Scruff will take time to come see them, of course he will accuse me of using my CDs to spread PB&J on my kids’ sandwiches…
Stephan

If your house/office is doing that to your CD’s I hate to think what it
is
doing to you and your kids health! do you live on a boat or in a tent or something
Kind of, I live in Hawaii.
And don’t worry for us, the air is clean and the climate mild all year around 😉
And moldy.
S
SCRUFF
Jan 22, 2005
Exactly, duh.

"RSD99" wrote in message
"Stephan" stated:
"…
Kind of, I live in Hawaii.
…"

And the average ambient humidity is something like 85% plus … ???
Any guesses as to just exactly "why" you are having problems … ???
Buy a de-humidifier for your storage cabinet.

"Stephan" wrote in message
Kind of, I live in Hawaii.
And don’t worry for us, the air is clean and the climate mild all year around 😉

S
SCRUFF
Jan 22, 2005
"Stephan" wrote in message
RSD99 wrote:
"Stephan" stated:
"…
Kind of, I live in Hawaii.
…"

And the average ambient humidity is something like 85% plus … ???

Not at all, 85% is Florida, not Hawaii.
http://www.prh.noaa.gov/hnl/pages/climate_summary.php
Any guesses as to just exactly "why" you are having problems … ???

I don’t have problems, I use CDs only for short time storage.
Buy a de-humidifier for your storage cabinet.
No, I buy external hard drives.

At least we agree on that, since I do also for anything of value.
S
Stephan
Jan 22, 2005
Scruff wrote:

Obviously, since these cd’s are from different sources and suffer the same fate, it can easily be attributed to improper storage. I have NEVER seen anything like that personally from my own collection, my associates or my friends.
There are many things you have never seen, anyway, now you’ve seen CD decay. And if you "search" a bit longer you’ll see I’m not the only one with rotten CDs stories.

What you are showing is the exception rather than the rule, and no doubt came from some jungle basement, lol.

Exception or not, do you think it is still smart to claim CDs will last a few centuries?

Stephan
S
SCRUFF
Jan 22, 2005
"Stephan" wrote in message
Scruff wrote:

Obviously, since these cd’s are from different sources and suffer the
same
fate, it can easily be attributed to improper storage. I have NEVER seen anything like that personally from my own collection, my associates or
my
friends.
There are many things you have never seen, anyway, now you’ve seen CD decay. And if you "search" a bit longer you’ll see I’m not the only one with rotten CDs stories.

What you are showing is the exception rather than the rule, and no doubt came from some jungle basement, lol.

Exception or not, do you think it is still smart to claim CDs will last a few centuries?

Stephan
A few centuries? Who is claiming that? What conversation are you in?
S
Stephan
Jan 22, 2005
Scruff wrote:

A few centuries? Who is claiming that? What conversation are you in?

In this one.
In a link provided by Hecate in this thread (
http://www.mrichter.com/cdr/primer/durable.htm)
You will find this:
"From accelerated tests, manfuacturers will claim life expectancy of 100 or 200 years" (original misspelling copied and pasted) 200 hundred years is a few centuries, right?
But you will not have read it.
Anyway, that’s it for me here, you are boring me.

Stephan
S
SCRUFF
Jan 22, 2005
"Stephan" wrote in message
Scruff wrote:

A few centuries? Who is claiming that? What conversation are you in?

In this one.
In a link provided by Hecate in this thread (
http://www.mrichter.com/cdr/primer/durable.htm)
You will find this:
"From accelerated tests, manfuacturers will claim life expectancy of 100 or 200 years" (original misspelling copied and pasted) 200 hundred years is a few centuries, right?
But you will not have read it.
Anyway, that’s it for me here, you are boring me.

Stephan
And you are misinforming with spin.
H
Hecate
Jan 23, 2005
On Fri, 21 Jan 2005 20:07:07 -0500, "Scruff" wrote:

"Stephan" wrote in message
Hecate wrote:

But if you prefer a more informed and skeptical view:

http://www.mrichter.com/cdr/primer/durable.htm

And then there’s personal experience:

http://www.detnews.com/2004/techcolumns/0409/01/technology-2 59970.htm
Then there’s this guide from the US National Institute of Standards and Technology:

http://www.itl.nist.gov/div895/carefordisc/disccare.html
and this article is a really good round up including the PCActive tests which found CDs having a 2 year lifespan:
http://www.informationweek.com/story/showArticle.jhtml?artic leID=15800263

Want to see some less than 5 year old CDs? 😉
So tired of people recommending them as safe storage I had to finally shoot 4 of the ones I keep around to show my friends. The pictures are not up to my standards but they’ll do the job.
http://s94713401.onlinehome.us/CD%20decay/pages/2.htm
or
http://tinyurl.com/4wx8d
(Warning: 1000 px images)
The blue and green disks are from a game produced by Microsoft (!) and the one with the fonts is a music CD.
The other one is a home burned TDK about two years old and stored in a sleeve inside a folder
Hope Scruff will take time to come see them, of course he will accuse me of using my CDs to spread PB&J on my kids’ sandwiches…
Stephan
What on earth are you doing, spreading peanut butter on your kidssandwiches with those things?

Obviously, since these cd’s are from different sources and suffer the same fate, it can easily be attributed to improper storage. I have NEVER seen anything like that personally from my own collection, my associates or my friends.
What you are showing is the exception rather than the rule, and no doubt came from some jungle basement, lol.
And what you are doing is carefully replying to Stephan’s post whilst ignoring all the links I gave you showing you to be extremely optimistic as to CD durability.



Hecate – The Real One

veni, vidi, reliqui
S
SCRUFF
Jan 23, 2005
"Hecate" wrote in message
On Fri, 21 Jan 2005 20:07:07 -0500, "Scruff" wrote:
"Stephan" wrote in message
Hecate wrote:

But if you prefer a more informed and skeptical view:

http://www.mrichter.com/cdr/primer/durable.htm

And then there’s personal experience:

http://www.detnews.com/2004/techcolumns/0409/01/technology-2 59970.htm
Then there’s this guide from the US National Institute of Standards and Technology:

http://www.itl.nist.gov/div895/carefordisc/disccare.html
and this article is a really good round up including the PCActive tests which found CDs having a 2 year lifespan:
http://www.informationweek.com/story/showArticle.jhtml?artic leID=15800263

Want to see some less than 5 year old CDs? 😉
So tired of people recommending them as safe storage I had to finally shoot 4 of the ones I keep around to show my friends. The pictures are not up to my standards but they’ll do the job.
http://s94713401.onlinehome.us/CD%20decay/pages/2.htm
or
http://tinyurl.com/4wx8d
(Warning: 1000 px images)
The blue and green disks are from a game produced by Microsoft (!) and the one with the fonts is a music CD.
The other one is a home burned TDK about two years old and stored in a sleeve inside a folder
Hope Scruff will take time to come see them, of course he will accuse
me
of using my CDs to spread PB&J on my kids’ sandwiches…
Stephan
What on earth are you doing, spreading peanut butter on your
kidssandwiches
with those things?

Obviously, since these cd’s are from different sources and suffer the
same
fate, it can easily be attributed to improper storage. I have NEVER seen anything like that personally from my own collection, my associates or my friends.
What you are showing is the exception rather than the rule, and no doubt came from some jungle basement, lol.
And what you are doing is carefully replying to Stephan’s post whilst ignoring all the links I gave you showing you to be extremely optimistic as to CD durability.



Hecate – The Real One

veni, vidi, reliqui
Hmm, I guess I could say you are doing the same, unless you’ve read my links also.
We all know nothing lasts forever, and all cd’s have to do is last long enough to make it to the next big thing in data storage. Based on my own experience and all of the stuff I googled, cd’s will last a long time. The pics of moldy cd’s that stephan posted are probably in better shape that the hard copy data sitting in the album next to them.
Like anything, you have to take care of them. Having lived in Hawaii myself, some of my family still does, I know that you need to be a little extra careful. I’m not sure stephan has.
His original posts reeked a bit over the top from bad personal experience and a bit of paranoia.
Today’s cd burning capabilities are light years ahead of the first omen cd’s available. And the ones I have, including 15 year old ones from when I worked in computer software are still working fine. I even pulled a few out of the closet to prove it to myself.
So, when stephan says a couple of years, five max, or whatever, it’s obvious he’s reacting from his bad experiences.
As far as you go, Hecate, go find your oldest cd and try it. Let us know how it works.
I bet it’s just fine.
1
1000%
Jan 23, 2005
in article l2zId.63756$, Stephan at
wrote on 01/22/2005 12:52 PM:

Anyway, that’s it for me here, you are boring me.

Stephan

Stephan has a need to be constantly entertained, or he gets pissy. He is of the MTV generation. Very limited attention span.
S
SCRUFF
Jan 23, 2005
"1000%" <1000%@HotPOPS.Com> wrote in message news:BE191A98.156541%1000%@HotPOPS.Com…
in article l2zId.63756$, Stephan at
wrote on 01/22/2005 12:52 PM:

Anyway, that’s it for me here, you are boring me.

Stephan

Stephan has a need to be constantly entertained, or he gets pissy. He is
of
the MTV generation. Very limited attention span.
It goes along with his lack of common sense.
H
Hecate
Jan 24, 2005
On Sat, 22 Jan 2005 20:22:51 -0500, "Scruff" wrote:

And what you are doing is carefully replying to Stephan’s post whilst ignoring all the links I gave you showing you to be extremely optimistic as to CD durability.

Hmm, I guess I could say you are doing the same, unless you’ve read my links also.

Yes, read your link.

We all know nothing lasts forever, and all cd’s have to do is last long enough to make it to the next big thing in data storage. Based on my own experience and all of the stuff I googled, cd’s will last a long time. The pics of moldy cd’s that stephan posted are probably in better shape that the hard copy data sitting in the album next to them.
Like anything, you have to take care of them. Having lived in Hawaii myself, some of my family still does, I know that you need to be a little extra careful. I’m not sure stephan has.
His original posts reeked a bit over the top from bad personal experience and a bit of paranoia.
Today’s cd burning capabilities are light years ahead of the first omen cd’s available. And the ones I have, including 15 year old ones from when I worked in computer software are still working fine. I even pulled a few out of the closet to prove it to myself.

I think that anecdotal evidence, such as yours is fine, but you have to remember that the same does not hold true for everyone. CDs are not robust, and no where near as safe as DVDs. Now, if you happen to have written everything to gold disks, stored them in a cupboard and never tried to restore files from them, I accept that most will likely be OK for a reasonable amount of time.

However, the fact is that a lot of the cheapo disks will not last even if you lock them away with a dehumidifier and never open the cupboard. There are far too many WORN (Write Once Read Never) quality disks floating around.

So, when stephan says a couple of years, five max, or whatever, it’s obvious he’s reacting from his bad experiences.

Yes, but also from some of the reports, as I have listed above.

As far as you go, Hecate, go find your oldest cd and try it. Let us know how it works.
I bet it’s just fine.
I have had disks just die on me, which is why they are only ever temporary storage. Everything I had on CD is being moved to DVD or has already been moved to hard disk until I get time to write the DVDs. Plus I always have HDD copies on at least one internal and one external hard disk anyway.

As for those CDs I had – there were approximately 100. 10 were completely dead after varying periods between 1 and 4 years and 6 more had corrupt sectors. If I knew then what I know now I’d never have used CDs as archives.

The disks were virtually all gold/silver disk (not "pure" gold disks, but the next best) from makers like Kodak and were kept in storage.

So I wouldn’t trust them. YMMV.



Hecate – The Real One

veni, vidi, reliqui
S
Stephan
Jan 24, 2005
1000% wrote:

Stephan has a need to be constantly entertained, or he gets pissy. He is of the MTV generation. Very limited attention span.

Are you clairvoyant or psych analyst?
Anyway, you suck at both!

Stephan

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