LISTSERV mailing list manager LISTSERV 16.0

Help for ARSCLIST Archives


ARSCLIST Archives

ARSCLIST Archives


ARSCLIST@LISTSERV.LOC.GOV


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Proportional Font

LISTSERV Archives

LISTSERV Archives

ARSCLIST Home

ARSCLIST Home

ARSCLIST  January 2004

ARSCLIST January 2004

Subject:

Re: CDR media longevity

From:

Chris Lacinak <[log in to unmask]>

Reply-To:

Association for Recorded Sound Discussion List <[log in to unmask]>

Date:

Tue, 20 Jan 2004 14:53:45 -0800

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (118 lines)

There are at least a few issues that need to be addressed or thought of when
using CD-Rs which dictate a decision about brand and dye choice.

1. Media integrity. You pay for what you get. The effects of media integrity
are both short and long term. If you want a fighting chance don't use price
to dictate your decision. High Media integrity lends itself to low error
rates as well as low media defects, which both directly relate to life
expectancy. Because error rates are key in life expectancy a quality burner
and proper burning environment are also important to keep error rates at a
minimum. Take special note of the burning environment to help keep error
rates to a minimum.

2. Life expectancy. Whether you have chosen to use CD-Rs for preservation
copies or access copies there are a couple of things you can do to ensure
preservation of your content. One and/or both of these are a good idea
regardless of the intended purpose of the CD-R, but they are a must when the
intended purpose is to create a preservation copy.

        1.Make multiple CD-R copies using multiple brands. Do your research
and make an educated choice of multiple CDRs  based on differing
manufacturers, dyes, error rates, etc... This is a relatively low cost way
to intelligently spread         the burden of longevity over multiple brands
and not put all of your eggs into one basket. The more copies the better
your chances.

        2.A plan of integrity checks and migration are always a good idea as
well. The frequency would primarily be dictated by the size of your archive.
If it's small enough you can check everything fairly frequently. If you're
dealing with a larger archive statistal quality control sampling should be
implemented. The sampling plan should speak to the number and frequency of
quality control samples performed, and the resulting actions based on the
findings.


3. Compatibility. You want to use a CD-R which is compatible with the most
burners and players. Your chance of finding a player 20 years from now
(assuming your CD-R is still around) that will be compatible with the media
and play it back properly is obviously better with a more compatible CD-R.

        For example, Taiyo Yuden invented CD-R media technology and
therefore almost all burners and players created are spec'd using Taiyo
Yuden media. This would logically lead you to believe that greater
compatibility may be achieved with Taiyo Yuden media. This may be the basis
on which you choose one brand of CD-R, while also choosing to use Mitsui
gold media with Pthalocyanine dye for the longer projected life expectancy
and so on. 74 min. vs. 80 min. CD-Rs are also a consideration when looking
at compatibility.

Having said all of this, there are not too many players in the game anymore.
Many brands come from the same manufacturer. I can tell you that I have had
good experiences with both Mitsui gold CD-Rs and Taiyo Yuden CD-Rs, with
regard to error rates. Again, it must be noted, when looking at error rates,
the significance of the internal and external environments of both the
"burning" and testing mechanisms. Long term, storage environment plays a
significant role in increased error rates and should also be given major
consideration. Storage conditions may help to inform the frequency of
quality checks.

With regard to other digital storage mediums, all of the ones you have
listed could arguably serve as reasonable solutions. There are pros and cons
to any choice and any number of variables could lead you to any number of
solutions. The most significant factor is that your quality assurance and
migration schemes appropriately match the chosen media and associated
technology. Storage conditions, rate of technology obsolesence, physical and
chemical makeup of the media, error correction mechanisms, etc. all help to
inform these plans.

The short answer is that there is no simple yes or no answer. The decision
of the right media and methodologies for you revolve around your goals,
needs and limitations.

Please note that brand names mentioned are for the sake of example only. I
have no affiliation with any media company and am not promoting anything but
logical thinking and quality.

Regards,

Chris


Chris Lacinak
Director of Production & Operations
VidiPax, Inc.
450 West 31 St.
4th Floor
New York, New York
Tel. 212-563-1999 xt. 130
[log in to unmask]


-----Original Message-----
From: Jos Van Dyck [mailto:[log in to unmask]]
Sent: Tuesday, January 20, 2004 5:03 PM
To: [log in to unmask]
Subject: [ARSCLIST] CDR media longevity


We are transferring archive radio transcription disks and tapes to CDR for
digital archiving.

Which media would you recommend for real time (1x) recording, e.g. with Sony
CDR-W66?

We tried MAM-E Gold Prostudio, but BLER, E22, E32 (measured with StageTech
EC2) are unacceptable.

For archives, longevity is of paramount importance.
However, after a few years some CDRs are showing increasing error rates, and
some tracks become unreadable. (e.g. BASF by Ricoh, BASF by Kodak, Verbatim
by TDK).

Is systematic error checking of the whole archive needed? At what intervals?

What other digital storage media is more reliable than CDR (computer tapes,
hard disks)? What types of streamer tapes (AIT, DLT, SDLT, LTO)?

Jos

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

September 2020
August 2020
July 2020
June 2020
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007
July 2007
June 2007
May 2007
April 2007
March 2007
February 2007
January 2007
December 2006
November 2006
October 2006
September 2006
August 2006
July 2006
June 2006
May 2006
April 2006
March 2006
February 2006
January 2006
December 2005
November 2005
October 2005
September 2005
August 2005
July 2005
June 2005
May 2005
April 2005
March 2005
February 2005
January 2005
December 2004
November 2004
October 2004
September 2004
August 2004
July 2004
June 2004
May 2004
April 2004
March 2004
February 2004
January 2004
December 2003
November 2003
October 2003
September 2003
August 2003
July 2003
June 2003
May 2003
April 2003
March 2003
February 2003
January 2003

ATOM RSS1 RSS2



LISTSERV.LOC.GOV

CataList Email List Search Powered by the LISTSERV Email List Manager