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DVD shelf life

Discussion in 'DVD±R media' started by jackdjr, Dec 8, 2007.

  1. jackdjr

    jackdjr Member

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    I have been copying movies for several years with no problems. I have noticed that the movies I copied 3 years ago will no longer play without freezing up. These movies were copied using Memorex media which I have learned since then that they are not very reliable. They played fine when they were originally copied. Is this a failure of poor quality disks or a shelf life problem that affects all disks. What is the expected shelf life of good quality disks such as Sony, TDK etc

    Thanks,

    Jack
     
  2. bilbo65

    bilbo65 Regular member

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    It is a "failure of poor quality disks". TDK and some Sonys are not much better. Try Tys or Verbs for reliability. Good quality discs should last as long as the present DVD format.
     
  3. jackdjr

    jackdjr Member

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    Thanks I appreciate the fast response.

    Jack
     
  4. ZoSoIV

    ZoSoIV Regular member

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    BOTH, its a term called "Dye Rot" that causes the problem


    TDK will code out as cmc mag same as memorex so avoid that brand also. as said use either Taiyo Yuden or Verbatims and all will be good. they say TY media will last 100 years
     
  5. JoeRyan

    JoeRyan Active member

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    There is no such thing as "dye rot." The problem is a poor quality recording in the first place which can be due either to poor compatibility of the disc with the recording drive, poor quality discs, or both. If you checked the discs right after recording, you probably would have found high errors and/or high jitter indicating a poor recording. It would have been difficult to determine the exact cause unless one knew whether or not your drive and firmware version supported the MID code or not. Many members of this site dislike and denigrate Memorex and TDK because they use CMC as a supplier (as does Verbatim, by the way). Other sites have members who consider CMC as one of the best manufacturers and recommend both Memorex and TDK.

    As for Taiyo Yuden, they have issued a certificate stating that their DVD discs may last 50 years. Environmental tests indicate that well recorded DVD+R discs will last 39 years with 95% assurance and half of the discs in the test lasted 52 years. I doubt any DVD disc will make it 100 years because the dyes are azo cyanine and cyanine dyes.
     
  6. dilligaf9

    dilligaf9 Regular member

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    Since this topic is about Shelf life, what span of time do we have to keep stockpiled unused DVDs and get good burns on the DVD media. Months? years?
     
  7. creaky

    creaky Moderator Staff Member

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    i'm using my 2yr old stocks of unopened 'Verbatim Taiyo Yuden', the elusive TYG02 that i bulk-bought back when they appeared here in the UK for a short time. They spent a good year sat on the floor of my boat on the freezing river ie about 1foot under the water line and are holding up just fine
     
    Last edited: Dec 10, 2007
  8. JoeRyan

    JoeRyan Active member

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    The generally accepted rule is 7 years, but I have tested discs that are 8 years old with good results.
     
  9. iluvendo

    iluvendo Active member

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    IMHO, JoeRyan is THE authority on disc knowledge here at AD. When JR speaks on discs, I listen and take that info as gospel.
     
  10. dilligaf9

    dilligaf9 Regular member

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    Joe are there date codes on DVDs? Is there a way us common people can tell the date, month/year the discs were made? So we can rotate old stock.
     
  11. paulakiwi

    paulakiwi Guest

    Hiya, That is great to know about dvds that aren't that good afer 3 years...I have also wondered what happened years later after copying dvds & what is a good brand to buy as well...
     
  12. JoeRyan

    JoeRyan Active member

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    Yes, there are date codes in the ink-jet or laser-etched production codes on each disc. These are intentionally not easy to interpret, and each factory does it differently. For example, one factory has the numbers signifying, from left to right: coater number, factory building, disc format, production line, year, month, day, shift, serial number, and dye type. Another factory expresses the date in the Julian format. And they all change their codes regularly. These numbers are intended for technical assessors to determine the exact production moment and place for a disc in order to track defects if they occur.
     
  13. ZoSoIV

    ZoSoIV Regular member

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    thats why i don't keep a large stock, I just order 200 at a time .every now a then i do the 600 TY but not often
     
  14. bratcher

    bratcher Active member

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    Yes I order 200 discs at a time also & that seems to last me about 2 months before I have to order more. Haven't tried a 500 or 600 disc order yet. Perhaps I should one day!!
     
  15. Allegro1

    Allegro1 Regular member

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    200 in two months??!!!
    Do you have time to watch all those movies or are you backing up 1200 dpi bitmap scans of the library of congress? <g>
     
  16. bratcher

    bratcher Active member

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    Some were for the DVD recorder hooked up to the cable DVR. Lots of movies I haven't watched yet. I've stopped recording movies on the DVR for awhile. All I record now is a few TV shows I like to watch.

    Others were files saved from the computer of classic movies & TV shows from usenet binaries groups. Movies that are either out of print or not available to buy on video. I've got about 600 discs of those files so I stopped getting them from the newsgroups. A 2nd computer is kept busy with convertx2dvd turning those movies & TV shows into DVD's for my DVD player. Lots to watch!!

    I'll still buy 200 or so discs at a time though as I need them for the DVD video conversions & to record a few TV shows I want to keep from the cable DVR.
     
  17. RIOT08

    RIOT08 Member

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    Where do you guys buy your 200 DVD's at? Do they have better prices when you buy bulk?
     
  18. iluvendo

    iluvendo Active member

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    Meritline.com and supermediastore.com and yes to better prices on good media
     
    Last edited: Dec 18, 2007
  19. bratcher

    bratcher Active member

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    I buy mine from Meritline. A good place for both Verbatim & Tayio Yuden media. Sometimes you can get free shipping. Keep an eye on the media sales therads in this forum. Often Verbatim (in the stores( goes on sale & so do other brands like Maxell.
     
  20. ZoSoIV

    ZoSoIV Regular member

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    Meritline had a sale on the Taiyo Yuden 200 for 44.95 shipped so check it out
     
    Last edited: Dec 19, 2007

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