CD longevity

I've googled CD longevity and found a lot of stuff but nothing I would
hang my hat on.

Does anyone here know of recent studies on burned CD longevity? Should
I be asking in another newsgroup?

Thanks

Henry

wrote:
I've googled CD longevity and found a lot of stuff but nothing I would
hang my hat on.

Does anyone here know of recent studies on burned CD longevity? Should
I be asking in another newsgroup?

You're in the right place, but we don't have the answer either.
Manufacturers base their claims on accelerated life test with no basis
but guesses about chemical stability. No one credits the claim of 100
years for a burned disc; many of us have experience suggesting that the
ten-year shelf life unburned is longer than will be achieved in practice.

When Kodak was making discs, they claimed double the life - 200 years.
Unfortunately, all they produced to support it were pictures which could
be interpreted to mean that under accelerated testing, they lasted twice
as long.

Mike
--

http://www.mrichter.com/

.. --------------------------------------
Mike Richter, were you born with
"Scam Artist" emblazoned on your face?
--------------------------------------
(Mike Richter, any Material Connection w/ Roxio?)

http://groups.google.com/groups?selm...mindspring.com
(Messages 10, 12 -- 34, 54 -- 69)

( No pipsqueaks have been able to prove ANY of the above is a libel )
( -- despite Mikey's supposed to have examples of misquotes! )


wrote:

I've googled CD longevity and found a lot of stuff but nothing I would
hang my hat on.

Does anyone here know of recent studies on burned CD longevity? Should
I be asking in another newsgroup?

Time To Check your CDRs
http://www.langa.com/newsletters/2003/2003-11-03.htm

See these two threads:

==================================
From: "Den"
Subject: How long does CD-R's last
Date: 9/1/03
Message-ID:

Just seen this on the register;
http://www.theregister.co.uk/content/54/32593.html

Is their any guidelines on the lifetime of CD-R's branded and unbranded.

==================================
From: (Who Me?)
Subject: Some CDr brands degrade within months article
Date: 9/2/03
Message-ID:

Some CDr brands degrade within months article

http://theregister.co.uk/content/54/32593.html
==================================

wrote:

I've googled CD longevity and found a lot of stuff but nothing I would
hang my hat on.

Does anyone here know of recent studies on burned CD longevity? Should
I be asking in another newsgroup?


People who have been in the recording business for a while will remember
the claims made by magnetic tape manufacturers in the 70's about tape
life based on ageing tests. Many tapes made in the 70's went bad after a
few years (or even 6 months in the case of one tape I had).

All I can tell you is that 8 year old Taiyo Yuden discs burned in my
Philips burner still show low error rates today. There will almost
certainly be people with 10 or 12 year old discs who could tell you how
well they have survived.

Cheers.

James.

"Mike Richter" wrote
When Kodak was making discs, they claimed double the life - 200 years.

200 years, right.
I have few golden Kodak CD-Rs containing RAR-arcives
etc. 5 years ago there weren't any problems, but if I try to
extract files from the archives now, I get CRC-errors here
and there. I have stored the discs in room-temperature
protected from the sun etc. and the surface looks like
100% scratch-free also.

And people seem to have this strange opinion that these very
same golden Kodaks were the best media available that time.
Have they tried to read the contents of the discs lately? ;-)

"Aki Peltola" wrote:

200 years, right.
I have few golden Kodak CD-Rs containing RAR-arcives
etc. 5 years ago there weren't any problems, but if I try to
extract files from the archives now, I get CRC-errors here
and there. I have stored the discs in room-temperature
protected from the sun etc. and the surface looks like
100% scratch-free also.

I've had a similar situation in which more than a few of the Kodak gold CDs
I recorded a few years back are rife with C2 errors. I managed to discover
and copy the data before the errors became unrecoverable. It's just as well
they're not made any more...

Rick.
-+---

http://www.alienshore.com/seeking/

"Rick Pali" wrote:

"Aki Peltola" wrote:

200 years, right.
I have few golden Kodak CD-Rs containing RAR-arcives
etc. 5 years ago there weren't any problems, but if I try to
extract files from the archives now, I get CRC-errors here
and there. I have stored the discs in room-temperature
protected from the sun etc. and the surface looks like
100% scratch-free also.

I've had a similar situation in which more than a few of the Kodak gold CDs
I recorded a few years back are rife with C2 errors. I managed to discover
and copy the data before the errors became unrecoverable. It's just as well
they're not made any more...

Rick.
-+---

http://www.alienshore.com/seeking/

I did a check on my Kodak Golds recorded back in 1997 and they are
still good. Can say the same for some of the other brands. Nero has
a test module that will show what errors there are on a disk.

"Rick Pali" wrote:

"Aki Peltola" wrote:

200 years, right.
I have few golden Kodak CD-Rs containing RAR-arcives
etc. 5 years ago there weren't any problems, but if I try to
extract files from the archives now, I get CRC-errors here
and there. I have stored the discs in room-temperature
protected from the sun etc. and the surface looks like
100% scratch-free also.

I've had a similar situation in which more than a few of the Kodak gold CDs
I recorded a few years back are rife with C2 errors. I managed to discover
and copy the data before the errors became unrecoverable. It's just as well
they're not made any more...

Rick.
-+---

http://www.alienshore.com/seeking/

I did a check on my Kodak Golds recorded back in 1997 and they are
still good. Can't say the same for some of the other brands. Nero
has a test module that will show what errors there are on a disk.

Mutlley wrote:

"Rick Pali" wrote:

"Aki Peltola" wrote:

200 years, right.
I have few golden Kodak CD-Rs containing RAR-arcives
etc. 5 years ago there weren't any problems, but if I try to
extract files from the archives now, I get CRC-errors here
and there. I have stored the discs in room-temperature
protected from the sun etc. and the surface looks like
100% scratch-free also.

I've had a similar situation in which more than a few of the Kodak gold CDs
I recorded a few years back are rife with C2 errors. I managed to discover
and copy the data before the errors became unrecoverable. It's just as well
they're not made any more...

Rick.
-+---

http://www.alienshore.com/seeking/

I did a check on my Kodak Golds recorded back in 1997 and they are
still good. Can't say the same for some of the other brands. Nero
has a test module that will show what errors there are on a disk.

Verbatim Datalife Plus burned in 1997 with 2x Omniwriter26A(Ricoh).The
ones I have tested are error free.This is the only type media I have
ever used.

Dino wrote:

Mutlley wrote:

"Rick Pali" wrote:

"Aki Peltola" wrote:

200 years, right.
I have few golden Kodak CD-Rs containing RAR-arcives
etc. 5 years ago there weren't any problems, but if I try to
extract files from the archives now, I get CRC-errors here
and there. I have stored the discs in room-temperature
protected from the sun etc. and the surface looks like
100% scratch-free also.

I've had a similar situation in which more than a few of the Kodak gold CDs
I recorded a few years back are rife with C2 errors. I managed to discover
and copy the data before the errors became unrecoverable. It's just as well
they're not made any more...

Rick.
-+---

http://www.alienshore.com/seeking/

I did a check on my Kodak Golds recorded back in 1997 and they are
still good. Can't say the same for some of the other brands. Nero
has a test module that will show what errors there are on a disk.

Verbatim Datalife Plus burned in 1997 with 2x Omniwriter26A(Ricoh).The
ones I have tested are error free.This is the only type media I have
ever used.

I have now changed to Verbatim since the demise of Kodak. Both for
CDR and DVDR