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DVD Capacity question

Discussion in 'Multimedia' started by cmcnally, May 17, 2006.

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  1. cmcnally

    cmcnally Thread Starter

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    I'm new to burning DVDs and am having some issues with how much data they can hold. I'm using a Iomega External DVD drive. I'm not sure what model it is, but it shows up as LITE-ON DVDRW SOHW-1635 USB Device in my Device Manager. I'm using Philips 4.7 GB 1-16x DVD-R discs, and I have both Iomega Hotburn Pro, and UltraISO installed for burning. (I previously had Nero 7 on this machine, and it didn't really run so well.) When I use the Iomega software, I get a message that there isn't enough room on the DVD if I try to burn more than approximately 4.2 gigs. With UltraISO, I get a message that says "Error Reserving Zone for Burn" when trying to burn a 4.67 Gig DVD. (I'm trying to burn 28 rar files that total 4.67 gigs.) My question: if the DVDs say 4.7 gigs, why am I having these issues? Are there some burner settings I need to adjust? Do I have the wrong drivers installed? Is there some kind of index that takes up half a gig, and if so, can I eliminate it?
     
  2. emoxley

    emoxley

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    Every blank disc has info on it about the manufacturer, the disc ID code, info on being a +R, or -R, or RW, or DL disc, etc...........
    This info takes a little space. That's what you're running into.
    Even though they're a little expensive, if your burner is capable, you can get and burn to a double layer disc. They hold 8.5 GB.
    Good luck! :)
     
  3. cwwozniak

    cwwozniak Trusted Advisor Spam Fighter

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    From:

    http://www.imation.com/support/products/dvd_media.html

    The problem is that computers and DVD drives and its media count the numbers differently. Computers count according to a binary system (base 2). The creators of DVD standards decided to count bytes in a decimal system (like a human counts). A DVD labelled for 4.7GB capacity actually only holds 4.39GB in computer terms.

    Total storage capacity may be even less on DVD+RW and DVD-RW discs, because these discs require formatting before or during burning, and the format takes up space as well.

    In computer terms: 1GB = 1 gigabyte = 1,073,741,824 bytes

    In DVD terms: 1GB = 1 gigabyte = 1,000,000,000 bytes​
     
  4. thecoalman

    thecoalman

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    A quick tip, I try and keep my burns under 4 GB. Failures are more likely to occur at the end of the burn.
     
  5. JohnWill

    JohnWill Retired Moderator

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    You are falling victim to "disk manufacturer gigabytes". A 4.7gig DVD has a 4,700,000,000 byte capacity. When you convert them to real gigabytes, you get 4.377gigs, which is the real capacity of a single layer DVD.
     
  6. kaaos

    kaaos

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    There are programs that can shrink the movie to fit on one dvd even if its more than4.7gbs
     
  7. cwwozniak

    cwwozniak Trusted Advisor Spam Fighter

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    They won't help cmcnally much. They are trying to burn RAR data files on the DVD.

    I am not that familiar with creating RAR files. Are there any settings in the RAR compression program that make it try to maximize the compression?
     
  8. kaaos

    kaaos

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    maybe zip it then rar the zip ?
     
  9. StumpedTechy

    StumpedTechy

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    No raring a zip, or zipping a rar for that matter, gains you no further compression factor.

    As far as rar they do have the ability to span the rar but with 28 files I should think its easy to remove 1 file and have a good burn. There are different rar compression types but again its only going to help depending on whats rared to being with. You can only compress some things to a certain extent. I.E. Word documents compress down a heck of alot more than an AVI file.
     
  10. cmcnally

    cmcnally Thread Starter

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    Wow, thanks for all the feedback. I don't think I've ever posted anything that generated so much discussion. Glad I now understand what's going on.
     
  11. JohnWill

    JohnWill Retired Moderator

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    You want to make a post that generates lots of discussion, drop into Civil Debate and post something on religion or politics! :D
     
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