Cycle Redundancy Check?? Eh?

Discussion in 'DIY Computers' started by Bryan, Apr 27, 2004.

  1. Bryan

    Bryan Guest

    What does this mean. My DVD drive gives me this error when I am trying to
    copy files from DVD/CD.


    Bryan, Apr 27, 2004
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  2. It means that either the CD you are trying to copy has errors, or the
    drive is going bad. if it happens with all CDs then it's the drive. CRC
    is a 'checksum' on data, like a parity check (only better).

    Of course some CDs have some sectors which are manufactured with CRC
    errors purposely to prevent copying, but those are normally in places
    which the average application would not be reading.
    GSV Three Minds in a Can, Apr 27, 2004
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  3. Bryan

    Bryan Guest

    Thanks for the reply! Think its the drive as it has been doing it for months
    with all kinds of dvd/cd's.


    Bryan, Apr 27, 2004
  4. Bryan

    Jim Howes Guest

    Such objects look like, feel like, smell like, and probably taste like
    CD's, but they are not.

    You'll probably notice that they lack the 'Compact Disc Digital Audio'
    marking that you normally find on all real CD's.

    Atleast the record companies have started labelling their corrupt
    products as such (with 'compatibility' charts on the inlay card).
    However, my DVD player plays audio CD's via Digital Audio Extraction,
    and can't play these discs, so their charts are incorrect.

    My advice with such media is to contribute to the record companies
    paranoia by not buying them. They will no doubt assume that the
    downturn in CD sales is down to piracy, and not to the blatantly obvious
    factors of:

    A) There is virtually no decent music worth buying today
    B) Their 'technological measures' against piracy are harming their own

    Enough of that, as it's drifting off at 90 degrees to the group topic,
    but back to the OP's question. Probably the drive starting to die. You
    could try a cleaning kit, but if it's both CD's and DVD's, that is
    unlikely to help, as there is usually a different lens/laser-diode
    assembley for each.
    With DVD-ROM drives at prices like £15.86 incl VAT (Redstore) or devices
    such as a Sony DVD-ROM/CD-RW combo at £20.25, or even the LGE GSA4082B
    DVD+/- R/RW/RAM at £72.00 incl VAT (DABS) it's hardly worth fixing...
    Jim Howes, Apr 27, 2004
  5. I was using the loose definition of CD, as 'something that plays in a
    computer CD drive' - many games, for instance, are nominally on 'CD' but
    have deliberate bad sectors or screwed up indexing. Yes, I agree, music
    'CDs' with anti-computer garbage on are thoroughly evil.
    GSV Three Minds in a Can, Apr 27, 2004
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