real DVD5 capacity?

Discussion in 'DVDR' started by Gomar, Mar 23, 2009.

  1. Gomar

    Gomar Member

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    I am confused about the real DVD5 capacity.
    Is it 4.7gb, or 4.38gb of actual data storage?

    Using BurnAware, set to UDF, I got 4,366mb total
    size on disk;However, it says 117mb free.
    huh? Is this a software error?

    4.7 - 4.366 = 0.334
    But, 4.38 - 4.366 = 0.014
    Therefore, either 334mb or 14mb are really left on disk, not 117mb.
     
    Gomar, Mar 23, 2009
    #1
  2. grampyga

    grampyga Regular member

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    Following from Wikipedia “DVD”

    Single layer recordable disc capacities are as follows.

    DVD-R:
    4,707,319,808 bytes /1024 = 4596992 kibibytes
    4596992 kibibytes /1024 = 4489.25 mebibytes
    4489.25 mibibytes / 1024 = 4.3840 gibibytes

    DVD+R:
    4,700,372,992 bytes /1024 = 4590208 kibibytes
    4590208 kibibytes / 1024 = 4482.625 mebibytes
    4482.625 mebibytes / 1024 = 4.3776 gibibytes

    So if used DVD+R disc, which is 4483 MB (mibibytes), and wrote 4366 MB, then 117MB remain

    (Edit)
    Note: In Wikipedia quote, "109" is 10^9 and "230" is 2^30. Simple copy and paste didn't work... sorry.
     
    Last edited: Mar 23, 2009
    grampyga, Mar 23, 2009
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  3. MysticE

    MysticE Active member

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    Your math is all wrong, 4366mb plus 117MB equals 4.38GB.
     
    MysticE, Mar 24, 2009
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