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CD-R reliability

Discussion in 'Electronic Repair' started by Anonymous, Aug 27, 2003.

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  1. Anonymous

    Anonymous Guest

    I dont know if this is off topic on this newsgroup but I have problems with some of my CD-Rs which are 1 or 2 year old. The movies on them begins to show signs of data lost. When the movies are played, large image blocks sometimes appear. I know for sure the originals do not have them. The CD_Rs are Maxell, Fuji films and Sony. I am quite sure it is not the CD recorder because I always watch the recorded movies right after the recording to make sure they are in good quality. I store the CDs in a cool place without any UV.

    Anyone else has the same problem? Is there a brand of CD-Rs with guarantee longevity, like 60 years or so?
    -=-
    NOTE: This message was posted via one or more anonymous remailing services.
     
  2. Mike Berger

    Mike Berger Guest

    Sony claimed a 10 year lifetime for CD's on their web site. They said it was due
    to physical effects as the plastic shrunk. I'm sure they were being pessimistic, as
    we've all seen good CD's older than that. But it seemed like a good explanation
    for a potential problem down the line.
     
  3. ajb

    ajb Guest

    Kodak Gold and Gold/Silver CD-Rs used to be quoted at 50 yrs+ working
    life if stored in appropriate conditions. Kodak have discontinued
    these CDs but may have some old stock available.

    http://wwwuk.kodak.com/UK/en/digital/shop/

    If Kodak were confident in their special metal film technology I see
    no reason why other makers might not achieve similar claimed
    reliability.

    I have had occasional failures with other makes, but never Kodak. I
    did a little test - recorded two disks, one a "Premium Grade"
    unbranded and one a Kodak. Left them naked and label side down on the
    back shelf of a car which was parked outside, in sun for at least half
    the day, from November to March, checking the disks every few days.
    That is, plenty of full sun, and temperatures varing from below
    freezing to hot to the touch, and humidity varying from condensation
    on a frosty disk to dry. I took some care not to let them get
    scratched or knocked about and cleaned them very carefully and
    cautiously before testing.

    The anonymous disk gave no errors at all for 30 days and then suddenly
    became completely unreadable. The Kodak disk still seems perfect,
    though I am no longer torturing the poor thing.

    Hardly scientific or conclusive. YMMV but it's suggestive
    nevertheless.

    Regards

    AJB
     
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