Showing posts with label CDR. Show all posts
Showing posts with label CDR. Show all posts

Friday, May 9, 2014

Photos shared by @SABCRadioArc on Twitter for National Archives Week

The following photos were shared on Twitter during National Archives Week in South Africa.

SABC Radio Archives on Twitter: @SABCRadioArc

Photos depicting our different collections, as well as the different audio storage mediums in the radio archives:







Blog post by Karen du Toit.
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Wednesday, February 23, 2011

Interview with a systems administrator in the SABC Record Library

Marinda Wolmarans
SABC Record Library
This is the second interview as part of a series of blog posts to gain a better understanding of the SABC Record Library, as well as part of a series of blog posts about the SABC Media Libraries. It is a way of generating a better understanding of what we do in the different sections that we belong to.

The interview is with Marinda Wolmarans, a Systems Administrator in the Record library. The SABC Record Library houses recorded music, previously unavailable, as well as all genres of recorded music, including Jazz, Gospel, Kwaito, Rap, Rave, Classical, World, Light, Mood, Sound Effects and others. The music is regularly accessed by staff and made available to internal clients of the SABC.

Please tell us a little bit about yourself. (Where you grew up, where and what you studied and your work experience before you joined the SABC Record Library)
I was born in JHB. I worked at Trust Bank now Absa and from there started at the SABC.

Please tell us about a normal day in your office.
When I arrive in the morning the first is checking e-mails and regularly during the day as well.  The Regions and JHB send performers and labels to be added on the system to be able to capture the information on the system.  Not one day is the same, some days problems that affects all the Regions will be send via e-mail or I’ll be contacted telephonically to rectify the mistakes made on the systems.  I check CD information and send the mistakes back to the regions and JHB personnel to rectify.  It takes a lot of time because you have to check who added the CD first, everything needs to be written down and checked thoroughly. People need to be focused when capturing of CDs are being done.

What does the future have in store for us digitally?
I can’t wait for the Digital System but I foresee we might have problems with the information on the CD’s and the actual songs on the disc. I hope that all the information that we currently have will be transferred without any major problems.

Tell us why you enjoy doing the work that you do.
Every day has a different challenge.

Related post:
Interview with a Record Librarian at the SABC record Library

Questions and post by Karen du Toit, Afrikaans Archivist in the SABC Radio Archives
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Tuesday, December 8, 2009

How long do CD-Rs last?

The manufacturers claim 75 years (cyanine dye, used in "green" discs), 100 years (phthalocyanine dye, used in "gold" discs), or even 200 years ("advanced" phthalocyanine dye, used in "platinum" discs) once the disc has been written. The shelf life of an unrecorded disc has been estimated at between 5 and 10 years. There is no standard agreed-upon way to test discs for lifetime viability. Accelerated aging tests have been done, but they may not provide a meaningful analogue to real-world aging.

Exposing the disc to excessive heat, humidity, or to direct sunlight will greatly reduce the lifetime. In general, CD-Rs are far less tolerant of environmental conditions than pressed CDs, and should be treated with greater care. The easiest way to make a CD-R unusable is to scratch the top surface. Find a CD-R you don't want anymore, and try to scratch the top (label side) with your fingernail, a ballpoint pen, a paper clip, and anything else you have handy. The results may surprise you.

Keep them in a cool, dark, dry place, and they will probably live longer than you do (emphasis on "probably"). Some newsgroup reports have complained of discs becoming unreadable in as little as three years, but without knowing how the discs were handled and stored such anecdotes are useless. Try to keep a little perspective on the situation: a disc that degrades very little over 100 years is useless if it can't be read in your CD-ROM drive today.

By some estimates, pressed CD-ROMs may only last for 10 to 25 years, because the aluminium reflective layer starts to corrode after a while.

One user was told by Blaupunkt that CD-R discs shouldn't be left in car CD players, because if it gets too hot in the car the CD-R will emit a gas that can blind the laser optics. However, CD-Rs are constructed much the same way and with mostly the same materials as pressed CDs, and the temperatures required to cause such an emission from the materials that are exposed would melt much of the car's interior. The dye layer is sealed into the disc, and should not present any danger to drive optics even if overheated. Even so, leaving a CD-R in a hot car isn't good for for the disc, and will probably shorten its effective life.
Marius Oosthuizen (Sound Engineer, SABC Radio Archives)
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